/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/lcm1_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:21:14,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:21:14,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:21:14,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:21:14,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:21:14,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:21:14,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:21:14,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:21:14,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:21:14,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:21:14,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:21:14,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:21:14,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:21:14,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:21:14,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:21:14,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:21:14,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:21:14,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:21:14,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:21:14,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:21:14,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:21:14,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:21:14,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:21:14,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:21:14,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:21:14,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:21:14,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:21:14,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:21:14,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:21:14,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:21:14,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:21:14,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:21:14,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:21:14,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:21:14,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:21:14,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:21:14,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:21:14,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:21:14,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:21:14,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:21:14,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:21:14,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:21:14,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:21:14,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:21:14,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:21:14,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:21:14,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:21:14,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:21:14,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:21:14,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:21:14,610 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:21:14,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:21:14,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:21:14,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:21:14,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:21:14,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:21:14,932 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:21:14,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound100.c [2021-05-02 21:21:14,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f94d0ae/e6f54d26d6c849ae8c1dc01263bb24db/FLAGdc0d2b2a4 [2021-05-02 21:21:15,392 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:21:15,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound100.c [2021-05-02 21:21:15,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f94d0ae/e6f54d26d6c849ae8c1dc01263bb24db/FLAGdc0d2b2a4 [2021-05-02 21:21:15,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f94d0ae/e6f54d26d6c849ae8c1dc01263bb24db [2021-05-02 21:21:15,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:21:15,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:21:15,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:21:15,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:21:15,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:21:15,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbf27ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15, skipping insertion in model container [2021-05-02 21:21:15,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:21:15,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:21:15,599 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/lcm1_valuebound100.c[560,573] [2021-05-02 21:21:15,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:21:15,638 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:21:15,651 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/lcm1_valuebound100.c[560,573] [2021-05-02 21:21:15,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:21:15,729 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:21:15,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15 WrapperNode [2021-05-02 21:21:15,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:21:15,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:21:15,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:21:15,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:21:15,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (1/1) ... [2021-05-02 21:21:15,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:21:15,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:21:15,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:21:15,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:21:15,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (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 21:21:15,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:21:15,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:21:15,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:21:15,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:21:15,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:21:15,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:21:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:21:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:21:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:21:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:21:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:21:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:21:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:21:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:21:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:21:16,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:21:16,092 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 21:21:16,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:21:16 BoogieIcfgContainer [2021-05-02 21:21:16,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:21:16,094 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:21:16,094 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:21:16,095 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:21:16,097 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:21:16" (1/1) ... [2021-05-02 21:21:16,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:21:16 BasicIcfg [2021-05-02 21:21:16,113 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:21:16,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:21:16,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:21:16,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:21:16,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:21:15" (1/4) ... [2021-05-02 21:21:16,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ced05b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:21:16, skipping insertion in model container [2021-05-02 21:21:16,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:21:15" (2/4) ... [2021-05-02 21:21:16,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ced05b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:21:16, skipping insertion in model container [2021-05-02 21:21:16,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:21:16" (3/4) ... [2021-05-02 21:21:16,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ced05b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:21:16, skipping insertion in model container [2021-05-02 21:21:16,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:21:16" (4/4) ... [2021-05-02 21:21:16,119 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound100.cJordan [2021-05-02 21:21:16,123 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:21:16,126 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:21:16,140 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:21:16,155 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:21:16,155 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:21:16,155 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:21:16,155 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:21:16,155 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:21:16,155 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:21:16,155 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:21:16,155 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:21:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 21:21:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:21:16,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:21:16,173 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 21:21:16,173 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:21:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:21:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2059041159, now seen corresponding path program 1 times [2021-05-02 21:21:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:21:16,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656266241] [2021-05-02 21:21:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:21:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:21:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:21:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:21:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:21:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 21:21:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 21:21:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 21:21:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,578 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 21:21:16,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:21:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656266241] [2021-05-02 21:21:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656266241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:21:16,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:21:16,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:21:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430427724] [2021-05-02 21:21:16,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:21:16,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:21:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:21:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:21:16,597 INFO L87 Difference]: Start difference. First operand has 40 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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 21:21:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:21:16,776 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 21:21:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:21:16,778 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 21:21:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:21:16,784 INFO L225 Difference]: With dead ends: 40 [2021-05-02 21:21:16,785 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:21:16,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:21:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:21:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 21:21:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 21:21:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 21:21:16,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 21:21:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:21:16,823 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 21:21:16,823 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 21:21:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 21:21:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:21:16,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:21:16,826 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 21:21:16,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:21:16,827 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:21:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:21:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1255008874, now seen corresponding path program 1 times [2021-05-02 21:21:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:21:16,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676325670] [2021-05-02 21:21:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:21:16,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:21:16,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360491770] [2021-05-02 21:21:16,875 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 21:21:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:21:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:21:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:21:17,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:21:17,318 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 21:21:17,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:21:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676325670] [2021-05-02 21:21:17,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:21:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360491770] [2021-05-02 21:21:17,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360491770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:21:17,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:21:17,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:21:17,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128748722] [2021-05-02 21:21:17,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:21:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:21:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:21:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:21:17,322 INFO L87 Difference]: Start difference. First operand 35 states and 46 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 21:21:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:21:17,616 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 21:21:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 21:21:17,617 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 21:21:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:21:17,619 INFO L225 Difference]: With dead ends: 52 [2021-05-02 21:21:17,619 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:21:17,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:21:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:21:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-02 21:21:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 21:21:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-05-02 21:21:17,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 43 [2021-05-02 21:21:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:21:17,628 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-05-02 21:21:17,628 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 21:21:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-05-02 21:21:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 21:21:17,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:21:17,630 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 21:21:17,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:21:17,831 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:21:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:21:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1780836073, now seen corresponding path program 1 times [2021-05-02 21:21:17,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:21:17,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540086586] [2021-05-02 21:21:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:21:17,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:21:17,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968265763] [2021-05-02 21:21:17,846 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