/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/egcd2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:13:00,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:13:00,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:13:00,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:13:00,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:13:00,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:13:00,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:13:00,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:13:00,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:13:00,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:13:00,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:13:00,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:13:00,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:13:00,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:13:00,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:13:00,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:13:00,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:13:00,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:13:00,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:13:00,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:13:00,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:13:00,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:13:00,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:13:00,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:13:00,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:13:00,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:13:00,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:13:00,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:13:00,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:13:00,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:13:00,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:13:00,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:13:00,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:13:00,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:13:00,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:13:00,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:13:00,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:13:00,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:13:00,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:13:00,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:13:00,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:13:00,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:13:00,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:13:00,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:13:00,455 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:13:00,455 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:13:00,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:13:00,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:13:00,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:13:00,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:13:00,810 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:13:00,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-05-06 08:13:00,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35cb2c8d/c50a77079a3d453daa8e810e05e50427/FLAGde2e9b095 [2021-05-06 08:13:01,316 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:13:01,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2021-05-06 08:13:01,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35cb2c8d/c50a77079a3d453daa8e810e05e50427/FLAGde2e9b095 [2021-05-06 08:13:01,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35cb2c8d/c50a77079a3d453daa8e810e05e50427 [2021-05-06 08:13:01,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:13:01,358 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:13:01,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:13:01,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:13:01,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:13:01,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e05dc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01, skipping insertion in model container [2021-05-06 08:13:01,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:13:01,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:13:01,537 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/egcd2-ll_unwindbound1.c[490,503] [2021-05-06 08:13:01,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:13:01,576 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:13:01,588 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/egcd2-ll_unwindbound1.c[490,503] [2021-05-06 08:13:01,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:13:01,624 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:13:01,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01 WrapperNode [2021-05-06 08:13:01,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:13:01,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:13:01,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:13:01,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:13:01,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... [2021-05-06 08:13:01,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:13:01,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:13:01,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:13:01,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:13:01,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:13:01,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:13:01,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:13:01,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:13:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:13:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:13:01,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:13:01,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:13:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:13:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:13:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:13:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:13:01,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:13:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:13:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:13:01,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:13:02,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:13:02,098 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:13:02,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:02 BoogieIcfgContainer [2021-05-06 08:13:02,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:13:02,100 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:13:02,100 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:13:02,100 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:13:02,102 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:02" (1/1) ... [2021-05-06 08:13:02,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:13:02 BasicIcfg [2021-05-06 08:13:02,115 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:13:02,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:13:02,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:13:02,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:13:02,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:13:01" (1/4) ... [2021-05-06 08:13:02,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:13:02, skipping insertion in model container [2021-05-06 08:13:02,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:01" (2/4) ... [2021-05-06 08:13:02,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:13:02, skipping insertion in model container [2021-05-06 08:13:02,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:02" (3/4) ... [2021-05-06 08:13:02,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98c0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:13:02, skipping insertion in model container [2021-05-06 08:13:02,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:13:02" (4/4) ... [2021-05-06 08:13:02,121 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.cJordan [2021-05-06 08:13:02,142 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:13:02,146 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:13:02,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:13:02,180 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:13:02,180 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:13:02,180 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:13:02,180 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:13:02,180 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:13:02,180 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:13:02,180 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:13:02,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:13:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:13:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:13:02,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:02,207 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] [2021-05-06 08:13:02,207 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-06 08:13:02,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:02,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666343325] [2021-05-06 08:13:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:02,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712358682] [2021-05-06 08:13:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:13:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:02,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666343325] [2021-05-06 08:13:02,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712358682] [2021-05-06 08:13:02,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712358682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:02,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:02,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:13:02,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055105866] [2021-05-06 08:13:02,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:13:02,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:13:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:13:02,568 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:02,587 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 08:13:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:13:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-06 08:13:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:02,594 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:13:02,594 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:13:02,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:13:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:13:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:13:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 08:13:02,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 08:13:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:02,655 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 08:13:02,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 08:13:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:13:02,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:02,657 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, 1] [2021-05-06 08:13:02,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:13:02,858 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:02,859 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-06 08:13:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:02,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388021034] [2021-05-06 08:13:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:02,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:02,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458118417] [2021-05-06 08:13:02,876 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 [2021-05-06 08:13:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:13:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:03,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:03,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:03,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388021034] [2021-05-06 08:13:03,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:03,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458118417] [2021-05-06 08:13:03,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458118417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:03,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:03,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:13:03,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292963033] [2021-05-06 08:13:03,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:13:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:03,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:13:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:13:03,124 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:03,139 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 08:13:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:13:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:13:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:03,141 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:13:03,141 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:13:03,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:13:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:13:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 08:13:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 08:13:03,148 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 08:13:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:03,148 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 08:13:03,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 08:13:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:13:03,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:03,149 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, 1, 1] [2021-05-06 08:13:03,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,372 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-06 08:13:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:03,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125049585] [2021-05-06 08:13:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:03,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:03,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114846014] [2021-05-06 08:13:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:03,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:13:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:13:03,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:03,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125049585] [2021-05-06 08:13:03,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:03,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114846014] [2021-05-06 08:13:03,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114846014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:03,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:03,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:03,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673612373] [2021-05-06 08:13:03,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:03,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:03,615 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:03,710 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-06 08:13:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:03,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 08:13:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:03,715 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:13:03,715 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:13:03,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:13:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 08:13:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:13:03,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 08:13:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:03,736 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:13:03,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:13:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:13:03,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:03,740 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, 1, 1, 1, 1] [2021-05-06 08:13:03,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:03,953 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-06 08:13:03,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:03,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412437178] [2021-05-06 08:13:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:03,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:03,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849525709] [2021-05-06 08:13:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:13:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:04,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412437178] [2021-05-06 08:13:04,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:04,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849525709] [2021-05-06 08:13:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849525709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749127110] [2021-05-06 08:13:04,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:04,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:04,149 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:04,185 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-06 08:13:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:13:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:13:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:04,187 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:13:04,187 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:13:04,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:13:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:13:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:13:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-06 08:13:04,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 36 [2021-05-06 08:13:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:04,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-06 08:13:04,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-06 08:13:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:13:04,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:04,201 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, 1] [2021-05-06 08:13:04,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:04,417 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-06 08:13:04,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:04,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003557847] [2021-05-06 08:13:04,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:04,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:04,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826466945] [2021-05-06 08:13:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:13:04,585 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:13:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:13:04,617 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:13:04,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:13:04,741 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:13:04,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:05,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:13:05 BasicIcfg [2021-05-06 08:13:05,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:13:05,011 INFO L168 Benchmark]: Toolchain (without parser) took 3652.71 ms. Allocated memory is still 173.0 MB. Free memory was 138.5 MB in the beginning and 68.9 MB in the end (delta: 69.6 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 173.0 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.67 ms. Allocated memory is still 173.0 MB. Free memory was 138.3 MB in the beginning and 128.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: Boogie Preprocessor took 71.92 ms. Allocated memory is still 173.0 MB. Free memory was 128.0 MB in the beginning and 156.9 MB in the end (delta: -28.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: RCFGBuilder took 400.91 ms. Allocated memory is still 173.0 MB. Free memory was 156.9 MB in the beginning and 139.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: IcfgTransformer took 15.66 ms. Allocated memory is still 173.0 MB. Free memory was 139.0 MB in the beginning and 138.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,011 INFO L168 Benchmark]: TraceAbstraction took 2893.58 ms. Allocated memory is still 173.0 MB. Free memory was 137.5 MB in the beginning and 68.9 MB in the end (delta: 68.6 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:13:05,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 173.0 MB. Free memory is still 155.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.67 ms. Allocated memory is still 173.0 MB. Free memory was 138.3 MB in the beginning and 128.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.92 ms. Allocated memory is still 173.0 MB. Free memory was 128.0 MB in the beginning and 156.9 MB in the end (delta: -28.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 400.91 ms. Allocated memory is still 173.0 MB. Free memory was 156.9 MB in the beginning and 139.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.66 ms. Allocated memory is still 173.0 MB. Free memory was 139.0 MB in the beginning and 138.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2893.58 ms. Allocated memory is still 173.0 MB. Free memory was 137.5 MB in the beginning and 68.9 MB in the end (delta: 68.6 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=8, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L37] RET assume_abort_if_not(xy < 2147483647) VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L38] RET assume_abort_if_not(yy < 2147483647) VAL [\old(counter)=0, a=1, b=1, c=0, counter=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=0, counter=1, counter++=0, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L40] COND TRUE counter++<1 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [\old(counter)=0, a=1, b=1, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, xy=1, y=1, yy=1] [L46] COND FALSE !(counter++<1) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [\old(counter)=0, a=1, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=1, y=1, yy=1] [L40] EXPR counter++ VAL [\old(counter)=0, a=1, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, xy=1, y=1, yy=1] [L40] COND FALSE !(counter++<1) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2788.0ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 21.0ms, AutomataDifference: 196.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 163 SDtfs, 41 SDslu, 227 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.3ms AutomataMinimizationTime, 4 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 98.3ms SsaConstructionTime, 205.3ms SatisfiabilityAnalysisTime, 500.8ms InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 265 SizeOfPredicates, 5 NumberOfNonLiveVariables, 644 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 90/96 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...