/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-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:07:19,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:07:19,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:07:19,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 06:07:19,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 06:07:19,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 06:07:19,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 06:07:19,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 06:07:19,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 06:07:19,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 06:07:19,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 06:07:19,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 06:07:19,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:07:19,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:07:19,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:07:19,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:07:19,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:07:19,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:07:19,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:07:19,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:07:19,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:07:19,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:07:19,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:07:19,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:07:19,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:07:19,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:07:19,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:07:19,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:07:19,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:07:19,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:07:19,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:07:19,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:07:19,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:07:19,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:07:19,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:07:19,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:07:19,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:07:19,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:07:19,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:07:19,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:07:19,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:07:19,776 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:07:19,776 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:07:20,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:07:20,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:07:20,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:07:20,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:07:20,201 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:07:20,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2021-05-06 06:07:20,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccbd0dfb/2157c5e48459468ead82d290c7786e47/FLAG2c92d4beb [2021-05-06 06:07:20,672 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:07:20,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2021-05-06 06:07:20,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccbd0dfb/2157c5e48459468ead82d290c7786e47/FLAG2c92d4beb [2021-05-06 06:07:20,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccbd0dfb/2157c5e48459468ead82d290c7786e47 [2021-05-06 06:07:20,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:07:20,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:07:20,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:07:20,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:07:20,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:07:20,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:07:20" (1/1) ... [2021-05-06 06:07:21,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a060b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21, skipping insertion in model container [2021-05-06 06:07:21,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:07:20" (1/1) ... [2021-05-06 06:07:21,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:07:21,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:07:21,389 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-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2021-05-06 06:07:21,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:07:21,445 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:07:21,534 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-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2021-05-06 06:07:21,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:07:21,548 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:07:21,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21 WrapperNode [2021-05-06 06:07:21,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:07:21,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:07:21,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:07:21,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:07:21,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... [2021-05-06 06:07:21,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:07:21,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:07:21,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:07:21,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:07:21,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:07:21,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:07:21,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:07:21,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:07:21,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2021-05-06 06:07:21,776 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:07:21,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:07:21,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:07:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:07:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-06 06:07:22,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:07:22,605 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 06:07:22,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:22 BoogieIcfgContainer [2021-05-06 06:07:22,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:07:22,608 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:07:22,608 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:07:22,608 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:07:22,610 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:22" (1/1) ... [2021-05-06 06:07:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:07:22 BasicIcfg [2021-05-06 06:07:22,632 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:07:22,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:07:22,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:07:22,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:07:22,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:07:20" (1/4) ... [2021-05-06 06:07:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380cfe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:07:22, skipping insertion in model container [2021-05-06 06:07:22,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:07:21" (2/4) ... [2021-05-06 06:07:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380cfe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:07:22, skipping insertion in model container [2021-05-06 06:07:22,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:07:22" (3/4) ... [2021-05-06 06:07:22,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380cfe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:07:22, skipping insertion in model container [2021-05-06 06:07:22,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:07:22" (4/4) ... [2021-05-06 06:07:22,640 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.cJordan [2021-05-06 06:07:22,643 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:07:22,646 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:07:22,656 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:07:22,676 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:07:22,677 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:07:22,677 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:07:22,677 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:07:22,677 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:07:22,677 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:07:22,677 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:07:22,677 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:07:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 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) [2021-05-06 06:07:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 06:07:22,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:22,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:22,694 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash 542394869, now seen corresponding path program 1 times [2021-05-06 06:07:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:22,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34764238] [2021-05-06 06:07:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:23,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:23,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:23,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34764238] [2021-05-06 06:07:23,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34764238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:07:23,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:07:23,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 06:07:23,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470347528] [2021-05-06 06:07:23,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 06:07:23,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 06:07:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-06 06:07:23,336 INFO L87 Difference]: Start difference. First operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 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 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-05-06 06:07:23,563 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-06 06:07:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:24,126 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-06 06:07:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 06:07:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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 48 [2021-05-06 06:07:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:24,132 INFO L225 Difference]: With dead ends: 85 [2021-05-06 06:07:24,132 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 06:07:24,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-06 06:07:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 06:07:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 06:07:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2021-05-06 06:07:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-06 06:07:24,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2021-05-06 06:07:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:24,153 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-06 06:07:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 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) [2021-05-06 06:07:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-06 06:07:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 06:07:24,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:24,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:24,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:07:24,155 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1761345441, now seen corresponding path program 1 times [2021-05-06 06:07:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:24,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478182396] [2021-05-06 06:07:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:24,572 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 06:07:24,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:24,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:24,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478182396] [2021-05-06 06:07:24,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478182396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302165392] [2021-05-06 06:07:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 06:07:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:24,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:25,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302165392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:25,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:25,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 20 [2021-05-06 06:07:25,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959251639] [2021-05-06 06:07:25,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 06:07:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 06:07:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-06 06:07:25,008 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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) [2021-05-06 06:07:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:25,787 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 06:07:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:07:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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 53 [2021-05-06 06:07:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:25,788 INFO L225 Difference]: With dead ends: 62 [2021-05-06 06:07:25,789 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 06:07:25,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-05-06 06:07:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 06:07:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-05-06 06:07:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 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) [2021-05-06 06:07:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 06:07:25,793 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2021-05-06 06:07:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:25,793 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 06:07:25,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 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) [2021-05-06 06:07:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 06:07:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 06:07:25,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:25,795 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:26,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 06:07:26,015 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1016577077, now seen corresponding path program 2 times [2021-05-06 06:07:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:26,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735981058] [2021-05-06 06:07:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:26,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:26,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735981058] [2021-05-06 06:07:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735981058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:26,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578694023] [2021-05-06 06:07:26,626 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 [2021-05-06 06:07:27,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:07:27,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 06:07:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:27,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:27,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578694023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:27,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:27,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 21 [2021-05-06 06:07:27,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78644610] [2021-05-06 06:07:27,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 06:07:27,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 06:07:27,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-05-06 06:07:27,194 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 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) [2021-05-06 06:07:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:27,962 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 06:07:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 06:07:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 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 58 [2021-05-06 06:07:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:27,963 INFO L225 Difference]: With dead ends: 67 [2021-05-06 06:07:27,963 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 06:07:27,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-05-06 06:07:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 06:07:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-05-06 06:07:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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) [2021-05-06 06:07:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-06 06:07:27,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2021-05-06 06:07:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:27,968 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-06 06:07:27,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 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) [2021-05-06 06:07:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-06 06:07:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 06:07:27,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:07:27,969 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:07:28,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:28,188 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:07:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:07:28,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1571949025, now seen corresponding path program 3 times [2021-05-06 06:07:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:07:28,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441960826] [2021-05-06 06:07:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:07:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:28,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:07:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:07:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:07:28,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:07:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441960826] [2021-05-06 06:07:28,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441960826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:28,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774619967] [2021-05-06 06:07:28,560 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 [2021-05-06 06:07:29,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 06:07:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:07:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 06:07:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:07:29,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 06:07:29,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-05-06 06:07:29,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-06 06:07:29,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 06:07:29,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-06 06:07:29,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:25 [2021-05-06 06:07:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:07:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 06:07:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774619967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:07:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:07:29,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-05-06 06:07:29,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82664710] [2021-05-06 06:07:29,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 06:07:29,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:07:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 06:07:29,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:07:29,633 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 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) [2021-05-06 06:07:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:07:31,592 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 06:07:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 06:07:31,593 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 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 63 [2021-05-06 06:07:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:07:31,594 INFO L225 Difference]: With dead ends: 69 [2021-05-06 06:07:31,594 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 06:07:31,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1737.2ms TimeCoverageRelationStatistics Valid=320, Invalid=2542, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:07:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 06:07:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 06:07:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 06:07:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 06:07:31,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-05-06 06:07:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:07:31,596 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 06:07:31,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 27 states have internal predecessors, (111), 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) [2021-05-06 06:07:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 06:07:31,597 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 06:07:31,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:07:31,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:07:31 BasicIcfg [2021-05-06 06:07:31,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:07:31,808 INFO L168 Benchmark]: Toolchain (without parser) took 10818.87 ms. Allocated memory was 225.4 MB in the beginning and 463.5 MB in the end (delta: 238.0 MB). Free memory was 189.9 MB in the beginning and 227.9 MB in the end (delta: -38.1 MB). Peak memory consumption was 199.9 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 225.4 MB. Free memory is still 207.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.24 ms. Allocated memory is still 225.4 MB. Free memory was 189.7 MB in the beginning and 201.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: Boogie Preprocessor took 96.41 ms. Allocated memory is still 225.4 MB. Free memory was 201.6 MB in the beginning and 196.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: RCFGBuilder took 959.85 ms. Allocated memory was 225.4 MB in the beginning and 319.8 MB in the end (delta: 94.4 MB). Free memory was 196.3 MB in the beginning and 239.1 MB in the end (delta: -42.7 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: IcfgTransformer took 24.29 ms. Allocated memory is still 319.8 MB. Free memory was 239.1 MB in the beginning and 237.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,808 INFO L168 Benchmark]: TraceAbstraction took 9173.15 ms. Allocated memory was 319.8 MB in the beginning and 463.5 MB in the end (delta: 143.7 MB). Free memory was 237.0 MB in the beginning and 227.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 152.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:07:31,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 225.4 MB. Free memory is still 207.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 553.24 ms. Allocated memory is still 225.4 MB. Free memory was 189.7 MB in the beginning and 201.6 MB in the end (delta: -11.9 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.41 ms. Allocated memory is still 225.4 MB. Free memory was 201.6 MB in the beginning and 196.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 959.85 ms. Allocated memory was 225.4 MB in the beginning and 319.8 MB in the end (delta: 94.4 MB). Free memory was 196.3 MB in the beginning and 239.1 MB in the end (delta: -42.7 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.29 ms. Allocated memory is still 319.8 MB. Free memory was 239.1 MB in the beginning and 237.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9173.15 ms. Allocated memory was 319.8 MB in the beginning and 463.5 MB in the end (delta: 143.7 MB). Free memory was 237.0 MB in the beginning and 227.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 152.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 467]: 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, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9129.3ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 12.1ms, AutomataDifference: 4320.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 122 SDtfs, 300 SDslu, 1651 SDs, 0 SdLazy, 3077 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1882.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 305 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3342.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=3, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 157.4ms SsaConstructionTime, 1213.1ms SatisfiabilityAnalysisTime, 2409.2ms InterpolantComputationTime, 396 NumberOfCodeBlocks, 391 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 389 ConstructedInterpolants, 0 QuantifiedInterpolants, 3330 SizeOfPredicates, 23 NumberOfNonLiveVariables, 2677 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 13/76 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...