/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/geo2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:50:54,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:50:54,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:50:54,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:50:54,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:50:54,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:50:54,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:50:54,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:50:54,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:50:54,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:50:54,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:50:54,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:50:54,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:50:54,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:50:54,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:50:54,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:50:54,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:50:54,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:50:54,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:50:54,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:50:54,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:50:54,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:50:54,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:50:54,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:50:54,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:50:54,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:50:54,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:50:54,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:50:54,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:50:54,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:50:54,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:50:54,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:50:54,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:50:54,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:50:54,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:50:54,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:50:54,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:50:54,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:50:54,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:50:54,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:50:54,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:50:54,579 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:50:54,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:50:54,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:50:54,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:50:54,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:50:54,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:50:54,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:50:54,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:50:54,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:50:54,582 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:50:54,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:50:54,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:50:54,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:50:54,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:50:54,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:50:54,944 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:50:54,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-05-02 20:50:55,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e5e512/f937eaf4904146f08028fab8379cf91b/FLAG9b67ae8b2 [2021-05-02 20:50:55,425 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:50:55,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-05-02 20:50:55,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e5e512/f937eaf4904146f08028fab8379cf91b/FLAG9b67ae8b2 [2021-05-02 20:50:55,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061e5e512/f937eaf4904146f08028fab8379cf91b [2021-05-02 20:50:55,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:50:55,843 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:50:55,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:55,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:50:55,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:50:55,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:55" (1/1) ... [2021-05-02 20:50:55,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75146ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:55, skipping insertion in model container [2021-05-02 20:50:55,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:55" (1/1) ... [2021-05-02 20:50:55,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:50:55,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:50:55,960 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/geo2-ll_valuebound100.c[525,538] [2021-05-02 20:50:55,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:55,985 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:50:55,997 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/geo2-ll_valuebound100.c[525,538] [2021-05-02 20:50:56,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:56,027 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:50:56,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56 WrapperNode [2021-05-02 20:50:56,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:56,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:50:56,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:50:56,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:50:56,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:50:56,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:50:56,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:50:56,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:50:56,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (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 20:50:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:50:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:50:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:50:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:50:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:50:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:50:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:50:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:50:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:50:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:50:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:50:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:50:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:50:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:50:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:50:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:50:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:50:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:50:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:50:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:50:56,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:50:56,437 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:50:56,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:56 BoogieIcfgContainer [2021-05-02 20:50:56,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:50:56,439 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:50:56,439 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:50:56,440 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:50:56,442 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:56" (1/1) ... [2021-05-02 20:50:56,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:56 BasicIcfg [2021-05-02 20:50:56,472 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:50:56,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:50:56,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:50:56,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:50:56,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:50:55" (1/4) ... [2021-05-02 20:50:56,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc091e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:56, skipping insertion in model container [2021-05-02 20:50:56,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:56" (2/4) ... [2021-05-02 20:50:56,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc091e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:56, skipping insertion in model container [2021-05-02 20:50:56,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:56" (3/4) ... [2021-05-02 20:50:56,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc091e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:56, skipping insertion in model container [2021-05-02 20:50:56,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:56" (4/4) ... [2021-05-02 20:50:56,494 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound100.cJordan [2021-05-02 20:50:56,499 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:50:56,510 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:50:56,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:50:56,547 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:50:56,547 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:50:56,547 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:50:56,548 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:50:56,548 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:50:56,548 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:50:56,548 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:50:56,548 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:50:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:50:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:50:56,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:56,576 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:56,577 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1141493127, now seen corresponding path program 1 times [2021-05-02 20:50:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:56,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979477092] [2021-05-02 20:50:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:56,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:50:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:56,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:50:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:56,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:50:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:50:56,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:56,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979477092] [2021-05-02 20:50:56,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979477092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:50:56,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:50:56,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:50:56,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400641700] [2021-05-02 20:50:56,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:50:56,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:50:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:56,905 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:50:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:57,005 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-02 20:50:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:50:57,007 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:50:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:57,014 INFO L225 Difference]: With dead ends: 29 [2021-05-02 20:50:57,014 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 20:50:57,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 20:50:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 20:50:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:50:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 20:50:57,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-02 20:50:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:57,047 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 20:50:57,047 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:50:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 20:50:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:50:57,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:57,049 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:57,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:50:57,050 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1441395781, now seen corresponding path program 1 times [2021-05-02 20:50:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:57,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247106039] [2021-05-02 20:50:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:57,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604261403] [2021-05-02 20:50:57,084 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 20:50:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:50:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:57,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:50:57,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:57,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247106039] [2021-05-02 20:50:57,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:57,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604261403] [2021-05-02 20:50:57,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604261403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:57,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:57,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:50:57,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070553806] [2021-05-02 20:50:57,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:50:57,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:50:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:57,452 INFO L87 Difference]: Start difference. First operand 24 states and 26 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:50:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:57,545 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 20:50:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:57,545 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:50:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:57,546 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:50:57,546 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:50:57,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:50:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 20:50:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:50:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 20:50:57,554 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-02 20:50:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:57,555 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 20:50:57,556 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:50:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 20:50:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:50:57,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:57,557 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:57,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:50:57,770 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2044378429, now seen corresponding path program 1 times [2021-05-02 20:50:57,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:57,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299426491] [2021-05-02 20:50:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:57,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831570302] [2021-05-02 20:50:57,781 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 [2021-05-02 20:50:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:50:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:57,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:50:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299426491] [2021-05-02 20:50:58,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831570302] [2021-05-02 20:50:58,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831570302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:58,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:58,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:50:58,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758665879] [2021-05-02 20:50:58,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:50:58,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:50:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:50:58,008 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:50:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:58,109 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 20:50:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:50:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 20:50:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:58,113 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:50:58,113 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:50:58,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:50:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:50:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:50:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:50:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 20:50:58,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-02 20:50:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:58,127 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 20:50:58,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:50:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 20:50:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:50:58,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:58,129 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:58,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:58,352 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:58,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1793299131, now seen corresponding path program 2 times [2021-05-02 20:50:58,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:58,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916061663] [2021-05-02 20:50:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:58,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:58,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418065211] [2021-05-02 20:50:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 20:50:58,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:50:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:58,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:00,631 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 20:51:05,304 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:51:05,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:05,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:09,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:09,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:09,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:11,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:11,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:23,801 WARN L205 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:51:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:23,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:25,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:25,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,110 WARN L205 SmtUtils]: Spent 10.16 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:51:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:39,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:45,171 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_4 Int) (v_main_~z~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ v_main_~x~0_BEFORE_CALL_4 (- 1)))) (and (= (mod .cse0 v_main_~z~0_BEFORE_CALL_9) 0) (<= 0 v_main_~z~0_BEFORE_CALL_9) (not (= (+ (* v_main_~x~0_BEFORE_CALL_4 v_main_~z~0_BEFORE_CALL_9) 1) (+ v_main_~x~0_BEFORE_CALL_4 (* v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9)))) (not (= v_main_~z~0_BEFORE_CALL_9 0)) (let ((.cse1 (div .cse0 v_main_~z~0_BEFORE_CALL_9))) (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9)) (+ (* .cse1 v_main_~z~0_BEFORE_CALL_9) 1))) (<= v_main_~z~0_BEFORE_CALL_9 100)))) is different from false [2021-05-02 20:51:47,177 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_4 Int) (v_main_~z~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ v_main_~x~0_BEFORE_CALL_4 (- 1)))) (and (= (mod .cse0 v_main_~z~0_BEFORE_CALL_9) 0) (<= 0 v_main_~z~0_BEFORE_CALL_9) (not (= (+ (* v_main_~x~0_BEFORE_CALL_4 v_main_~z~0_BEFORE_CALL_9) 1) (+ v_main_~x~0_BEFORE_CALL_4 (* v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9)))) (not (= v_main_~z~0_BEFORE_CALL_9 0)) (let ((.cse1 (div .cse0 v_main_~z~0_BEFORE_CALL_9))) (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_9)) (+ (* .cse1 v_main_~z~0_BEFORE_CALL_9) 1))) (<= v_main_~z~0_BEFORE_CALL_9 100)))) is different from true [2021-05-02 20:51:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:51:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916061663] [2021-05-02 20:51:47,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418065211] [2021-05-02 20:51:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418065211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:47,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:47,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:51:47,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975949100] [2021-05-02 20:51:47,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:51:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:51:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=4, NotChecked=22, Total=182 [2021-05-02 20:51:47,180 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:52:30,874 WARN L205 SmtUtils]: Spent 29.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-02 20:52:38,976 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2021-05-02 20:52:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:45,377 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 20:52:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:52:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 20:52:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:45,379 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:52:45,379 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:52:45,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 74605.6ms TimeCoverageRelationStatistics Valid=51, Invalid=218, Unknown=7, NotChecked=30, Total=306 [2021-05-02 20:52:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:52:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-05-02 20:52:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-02 20:52:45,384 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-02 20:52:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:45,384 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-02 20:52:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:52:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-02 20:52:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:52:45,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:45,385 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:45,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,589 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:45,589 INFO L82 PathProgramCache]: Analyzing trace with hash -492636075, now seen corresponding path program 1 times [2021-05-02 20:52:45,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:45,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624012544] [2021-05-02 20:52:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:45,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:45,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807186262] [2021-05-02 20:52:45,615 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 [2021-05-02 20:52:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:52:45,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:45,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624012544] [2021-05-02 20:52:45,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:45,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807186262] [2021-05-02 20:52:45,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807186262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:45,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:45,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:45,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375160521] [2021-05-02 20:52:45,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:45,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:45,859 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:52:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:48,011 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-05-02 20:52:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 20:52:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:48,014 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:52:48,014 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:52:48,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:52:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:52:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:52:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 20:52:48,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 43 [2021-05-02 20:52:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:48,019 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 20:52:48,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:52:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 20:52:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:52:48,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:48,020 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:48,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:48,225 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1935793091, now seen corresponding path program 3 times [2021-05-02 20:52:48,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:48,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460253680] [2021-05-02 20:52:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:48,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:48,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737741988] [2021-05-02 20:52:48,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 20:52:48,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:52:48,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:49,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:52:53,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:53,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460253680] [2021-05-02 20:52:53,487 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:53,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737741988] [2021-05-02 20:52:53,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737741988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:53,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:53,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76210805] [2021-05-02 20:52:53,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:53,489 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:53:15,536 WARN L205 SmtUtils]: Spent 19.60 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-02 20:53:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:17,579 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 20:53:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:53:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-05-02 20:53:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:17,582 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:53:17,582 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:53:17,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20724.3ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:53:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:53:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:53:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:53:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:53:17,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-05-02 20:53:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:17,583 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:53:17,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:53:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:53:17,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:53:17,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:53:17,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:53:17 BasicIcfg [2021-05-02 20:53:17,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:53:17,787 INFO L168 Benchmark]: Toolchain (without parser) took 141944.23 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.0 MB in the beginning and 115.0 MB in the end (delta: 31.0 MB). Peak memory consumption was 68.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,787 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:53:17,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.29 ms. Allocated memory is still 180.4 MB. Free memory was 145.8 MB in the beginning and 136.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,788 INFO L168 Benchmark]: Boogie Preprocessor took 61.04 ms. Allocated memory is still 180.4 MB. Free memory was 136.1 MB in the beginning and 164.0 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,788 INFO L168 Benchmark]: RCFGBuilder took 348.18 ms. Allocated memory is still 180.4 MB. Free memory was 164.0 MB in the beginning and 149.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,788 INFO L168 Benchmark]: IcfgTransformer took 32.53 ms. Allocated memory is still 180.4 MB. Free memory was 149.3 MB in the beginning and 148.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,788 INFO L168 Benchmark]: TraceAbstraction took 141297.72 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 147.8 MB in the beginning and 115.0 MB in the end (delta: 32.7 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:53:17,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 182.29 ms. Allocated memory is still 180.4 MB. Free memory was 145.8 MB in the beginning and 136.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.04 ms. Allocated memory is still 180.4 MB. Free memory was 136.1 MB in the beginning and 164.0 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 348.18 ms. Allocated memory is still 180.4 MB. Free memory was 164.0 MB in the beginning and 149.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 32.53 ms. Allocated memory is still 180.4 MB. Free memory was 149.3 MB in the beginning and 148.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 141297.72 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 147.8 MB in the beginning and 115.0 MB in the end (delta: 32.7 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 141238.9ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 21.7ms, AutomataDifference: 84780.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 133 SDtfs, 90 SDslu, 561 SDs, 0 SdLazy, 325 SolverSat, 24 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 24032.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 95650.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.4ms SsaConstructionTime, 190.3ms SatisfiabilityAnalysisTime, 54717.5ms InterpolantComputationTime, 200 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 3 QuantifiedInterpolants, 889 SizeOfPredicates, 14 NumberOfNonLiveVariables, 687 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 82/103 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...