/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/nla-digbench-scaling/lcm2_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:36:58,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:36:58,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:36:58,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 21:36:58,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:36:58,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:36:58,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:36:58,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:36:58,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:36:58,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:36:58,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:36:58,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:36:58,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:36:58,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:36:58,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:36:58,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:36:58,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:36:58,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:36:58,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:36:58,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:36:58,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:36:58,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:36:58,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:36:58,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:36:58,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:36:58,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:36:58,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:36:58,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:36:58,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:36:58,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:36:58,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:36:58,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:36:58,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:36:58,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:36:58,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:36:58,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:36:58,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:36:58,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:36:58,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:36:58,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:36:58,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:36:58,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:36:58,728 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:36:58,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:36:59,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:36:59,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:36:59,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:36:59,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:36:59,043 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:36:59,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c [2021-05-02 21:36:59,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0705afa3c/9bd53d55f4894677911ef0639943b8c7/FLAGf68d9a7ad [2021-05-02 21:36:59,448 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:36:59,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c [2021-05-02 21:36:59,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0705afa3c/9bd53d55f4894677911ef0639943b8c7/FLAGf68d9a7ad [2021-05-02 21:36:59,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0705afa3c/9bd53d55f4894677911ef0639943b8c7 [2021-05-02 21:36:59,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:36:59,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:36:59,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:36:59,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:36:59,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:36:59,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dae9f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59, skipping insertion in model container [2021-05-02 21:36:59,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:36:59,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:36:59,657 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c[545,558] [2021-05-02 21:36:59,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:36:59,691 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:36:59,736 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound5.c[545,558] [2021-05-02 21:36:59,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:36:59,769 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:36:59,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59 WrapperNode [2021-05-02 21:36:59,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:36:59,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:36:59,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:36:59,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:36:59,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (1/1) ... [2021-05-02 21:36:59,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:36:59,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:36:59,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:36:59,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:36:59,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (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 21:36:59,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:36:59,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:36:59,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:36:59,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:36:59,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:36:59,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:36:59,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:36:59,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:36:59,890 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:36:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:36:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:36:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:36:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:36:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:36:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:36:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:36:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:36:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:36:59,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:36:59,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:37:00,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:37:00,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:37:00,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:37:00 BoogieIcfgContainer [2021-05-02 21:37:00,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:37:00,123 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:37:00,123 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:37:00,123 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:37:00,125 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:37:00" (1/1) ... [2021-05-02 21:37:00,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:37:00 BasicIcfg [2021-05-02 21:37:00,141 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:37:00,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:37:00,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:37:00,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:37:00,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:36:59" (1/4) ... [2021-05-02 21:37:00,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79586ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:37:00, skipping insertion in model container [2021-05-02 21:37:00,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:36:59" (2/4) ... [2021-05-02 21:37:00,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79586ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:37:00, skipping insertion in model container [2021-05-02 21:37:00,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:37:00" (3/4) ... [2021-05-02 21:37:00,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79586ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:37:00, skipping insertion in model container [2021-05-02 21:37:00,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:37:00" (4/4) ... [2021-05-02 21:37:00,147 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound5.cJordan [2021-05-02 21:37:00,151 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:37:00,154 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:37:00,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:37:00,202 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:37:00,202 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:37:00,203 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:37:00,203 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:37:00,203 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:37:00,203 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:37:00,203 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:37:00,203 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:37:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:37:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:37:00,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:37:00,245 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:37:00,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:37:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:37:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash -419271626, now seen corresponding path program 1 times [2021-05-02 21:37:00,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:37:00,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313021060] [2021-05-02 21:37:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:37:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:37:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:37:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:37:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:37:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 21:37:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 21:37:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 21:37:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 21:37:00,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:37:00,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313021060] [2021-05-02 21:37:00,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313021060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:37:00,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:37:00,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:37:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490774552] [2021-05-02 21:37:00,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:37:00,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:37:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:37:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:37:00,598 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:37:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:37:00,706 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 21:37:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:37:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 21:37:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:37:00,714 INFO L225 Difference]: With dead ends: 34 [2021-05-02 21:37:00,714 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 21:37:00,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:37:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 21:37:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 21:37:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 21:37:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-02 21:37:00,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-02 21:37:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:37:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-02 21:37:00,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:37:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-02 21:37:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:37:00,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:37:00,745 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:37:00,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:37:00,745 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:37:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:37:00,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1223303911, now seen corresponding path program 1 times [2021-05-02 21:37:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:37:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603762237] [2021-05-02 21:37:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:37:00,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:37:00,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056904707] [2021-05-02 21:37:00,789 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 21:37:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:37:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:37:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:37:01,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:37:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 21:37:01,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:37:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603762237] [2021-05-02 21:37:01,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:37:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056904707] [2021-05-02 21:37:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056904707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:37:01,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:37:01,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:37:01,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337793198] [2021-05-02 21:37:01,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:37:01,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:37:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:37:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:37:01,412 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:37:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:37:01,578 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 21:37:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 21:37:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 21:37:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:37:01,580 INFO L225 Difference]: With dead ends: 40 [2021-05-02 21:37:01,580 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 21:37:01,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:37:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 21:37:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-02 21:37:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:37:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-02 21:37:01,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2021-05-02 21:37:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:37:01,591 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-02 21:37:01,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:37:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-02 21:37:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 21:37:01,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:37:01,596 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 21:37:01,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:37:01,799 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:37:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:37:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1282076869, now seen corresponding path program 1 times [2021-05-02 21:37:01,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:37:01,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707879824] [2021-05-02 21:37:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:37:01,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:37:01,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974949484] [2021-05-02 21:37:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true