/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/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:20:22,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:20:22,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:20:22,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:20:22,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:20:22,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:20:22,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:20:22,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:20:22,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:20:22,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:20:22,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:20:22,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:20:22,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:20:22,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:20:22,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:20:22,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:20:22,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:20:22,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:20:22,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:20:22,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:20:22,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:20:22,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:20:22,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:20:22,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:20:22,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:20:22,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:20:22,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:20:22,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:20:22,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:20:22,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:20:22,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:20:22,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:20:22,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:20:22,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:20:22,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:20:22,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:20:22,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:20:22,461 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:20:22,461 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:20:22,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:20:22,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:20:22,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:20:22,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:20:22,724 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:20:22,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2021-05-02 19:20:22,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a67e466/5ccdbfdf8ed04f2d851b9b433f089b8e/FLAGfa6ff45ca [2021-05-02 19:20:23,147 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:20:23,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2021-05-02 19:20:23,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a67e466/5ccdbfdf8ed04f2d851b9b433f089b8e/FLAGfa6ff45ca [2021-05-02 19:20:23,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a67e466/5ccdbfdf8ed04f2d851b9b433f089b8e [2021-05-02 19:20:23,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:20:23,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:20:23,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:20:23,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:20:23,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:20:23,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747cd497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23, skipping insertion in model container [2021-05-02 19:20:23,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:20:23,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:20:23,312 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/lcm1.c[560,573] [2021-05-02 19:20:23,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:20:23,337 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:20:23,347 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/lcm1.c[560,573] [2021-05-02 19:20:23,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:20:23,389 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:20:23,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23 WrapperNode [2021-05-02 19:20:23,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:20:23,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:20:23,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:20:23,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:20:23,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:20:23,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:20:23,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:20:23,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:20:23,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:20:23,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:20:23,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:20:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:20:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:20:23,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:20:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:20:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:20:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:20:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:20:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:20:23,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:20:23,689 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 19:20:23,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:20:23 BoogieIcfgContainer [2021-05-02 19:20:23,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:20:23,691 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:20:23,691 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:20:23,691 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:20:23,693 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:20:23" (1/1) ... [2021-05-02 19:20:23,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:20:23 BasicIcfg [2021-05-02 19:20:23,714 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:20:23,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:20:23,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:20:23,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:20:23,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:20:23" (1/4) ... [2021-05-02 19:20:23,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70675d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:20:23, skipping insertion in model container [2021-05-02 19:20:23,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:20:23" (2/4) ... [2021-05-02 19:20:23,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70675d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:20:23, skipping insertion in model container [2021-05-02 19:20:23,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:20:23" (3/4) ... [2021-05-02 19:20:23,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70675d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:20:23, skipping insertion in model container [2021-05-02 19:20:23,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:20:23" (4/4) ... [2021-05-02 19:20:23,719 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1.cJordan [2021-05-02 19:20:23,722 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:20:23,724 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:20:23,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:20:23,764 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:20:23,764 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:20:23,764 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:20:23,764 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:20:23,764 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:20:23,764 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:20:23,764 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:20:23,764 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:20:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:20:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:20:23,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:23,784 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:23,784 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1683769565, now seen corresponding path program 1 times [2021-05-02 19:20:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:23,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582881894] [2021-05-02 19:20:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:23,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:20:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:23,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:20:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:24,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 19:20:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 19:20:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:24,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 19:20:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:20:24,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:24,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582881894] [2021-05-02 19:20:24,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582881894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:20:24,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:20:24,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:20:24,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517823869] [2021-05-02 19:20:24,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:20:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:20:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:20:24,040 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:20:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:24,173 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 19:20:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:20:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 19:20:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:24,179 INFO L225 Difference]: With dead ends: 37 [2021-05-02 19:20:24,179 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:20:24,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:20:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:20:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:20:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:20:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 19:20:24,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2021-05-02 19:20:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:24,203 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 19:20:24,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:20:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 19:20:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:20:24,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:24,205 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:24,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:20:24,205 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:24,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1540722147, now seen corresponding path program 1 times [2021-05-02 19:20:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:24,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508763670] [2021-05-02 19:20:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:24,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:24,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083747130] [2021-05-02 19:20:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:20:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:24,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 19:20:24,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:24,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508763670] [2021-05-02 19:20:24,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:24,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083747130] [2021-05-02 19:20:24,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083747130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:24,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:24,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:20:24,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366046445] [2021-05-02 19:20:24,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:20:24,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:20:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:20:24,540 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:20:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:24,688 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 19:20:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:20:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 19:20:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:24,689 INFO L225 Difference]: With dead ends: 47 [2021-05-02 19:20:24,690 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 19:20:24,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:20:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 19:20:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-05-02 19:20:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:20:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2021-05-02 19:20:24,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2021-05-02 19:20:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:24,697 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-05-02 19:20:24,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:20:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2021-05-02 19:20:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:20:24,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:24,698 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 19:20:24,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:20:24,913 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -882538100, now seen corresponding path program 1 times [2021-05-02 19:20:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:24,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548385492] [2021-05-02 19:20:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:24,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:24,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057605732] [2021-05-02 19:20:24,931 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