/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/egcd-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:18:22,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:18:22,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:18:22,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:18:22,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:18:22,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:18:22,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:18:22,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:18:22,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:18:22,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:18:22,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:18:22,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:18:22,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:18:22,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:18:22,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:18:22,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:18:22,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:18:22,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:18:22,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:18:22,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:18:22,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:18:22,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:18:22,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:18:22,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:18:22,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:18:22,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:18:22,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:18:22,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:18:22,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:18:22,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:18:22,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:18:22,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:18:22,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:18:22,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:18:22,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:22,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:18:22,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:18:22,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:18:22,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:18:22,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:18:22,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:18:22,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:18:22,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:18:22,345 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:18:22,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-02 20:18:22,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95ff94529/a1e0b6772edf49d7878cace45e03c040/FLAG698c8ec65 [2021-05-02 20:18:22,710 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:18:22,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-02 20:18:22,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95ff94529/a1e0b6772edf49d7878cace45e03c040/FLAG698c8ec65 [2021-05-02 20:18:23,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95ff94529/a1e0b6772edf49d7878cace45e03c040 [2021-05-02 20:18:23,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:18:23,160 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:18:23,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:23,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:18:23,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:18:23,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd0468a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23, skipping insertion in model container [2021-05-02 20:18:23,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:18:23,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:18:23,352 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/egcd-ll_valuebound1.c[489,502] [2021-05-02 20:18:23,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:23,400 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:18:23,440 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/egcd-ll_valuebound1.c[489,502] [2021-05-02 20:18:23,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:23,485 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:18:23,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23 WrapperNode [2021-05-02 20:18:23,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:23,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:18:23,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:18:23,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:18:23,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... [2021-05-02 20:18:23,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:18:23,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:18:23,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:18:23,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:18:23,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:18:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:18:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:18:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:18:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:18:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:18:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:18:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:18:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:18:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:18:24,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:18:24,168 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:18:24,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:24 BoogieIcfgContainer [2021-05-02 20:18:24,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:18:24,169 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:18:24,169 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:18:24,170 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:18:24,171 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:24" (1/1) ... [2021-05-02 20:18:24,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:24 BasicIcfg [2021-05-02 20:18:24,188 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:18:24,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:18:24,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:18:24,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:18:24,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:18:23" (1/4) ... [2021-05-02 20:18:24,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445cc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:24, skipping insertion in model container [2021-05-02 20:18:24,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:23" (2/4) ... [2021-05-02 20:18:24,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445cc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:24, skipping insertion in model container [2021-05-02 20:18:24,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:24" (3/4) ... [2021-05-02 20:18:24,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445cc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:24, skipping insertion in model container [2021-05-02 20:18:24,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:24" (4/4) ... [2021-05-02 20:18:24,200 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.cJordan [2021-05-02 20:18:24,203 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:18:24,211 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:18:24,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:18:24,235 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:18:24,235 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:18:24,235 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:18:24,235 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:18:24,235 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:18:24,235 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:18:24,236 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:18:24,236 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:18:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:18:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:24,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:24,253 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] [2021-05-02 20:18:24,253 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:24,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:18:24,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:24,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513115661] [2021-05-02 20:18:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:18:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:18:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:18:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:24,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:24,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513115661] [2021-05-02 20:18:24,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513115661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:24,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:24,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:18:24,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930921326] [2021-05-02 20:18:24,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:18:24,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:24,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:18:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:24,595 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:24,840 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:18:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:18:24,842 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:18:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:24,846 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:18:24,847 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:18:24,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:18:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:18:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:18:24,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:18:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:24,880 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:18:24,880 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:18:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:24,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:24,883 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] [2021-05-02 20:18:24,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:18:24,883 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:18:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:24,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169087443] [2021-05-02 20:18:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:24,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835030274] [2021-05-02 20:18:24,914 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 20:18:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:18:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:18:25,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169087443] [2021-05-02 20:18:25,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835030274] [2021-05-02 20:18:25,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835030274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:25,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:25,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628989790] [2021-05-02 20:18:25,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:25,276 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:25,394 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:18:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:18:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:25,397 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:18:25,397 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:18:25,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:18:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:18:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:18:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:18:25,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:18:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:25,416 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:18:25,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:18:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:18:25,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:25,420 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:25,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:18:25,636 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:18:25,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:25,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637732038] [2021-05-02 20:18:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:25,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:25,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562047024] [2021-05-02 20:18:25,650 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 20:18:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:18:25,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:25,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:26,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:26,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637732038] [2021-05-02 20:18:26,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:26,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562047024] [2021-05-02 20:18:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562047024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:26,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:26,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:18:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274237297] [2021-05-02 20:18:26,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:26,145 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:18:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:26,297 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:18:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-05-02 20:18:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:26,299 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:26,299 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:26,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:18:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:18:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:18:26,306 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:18:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:26,306 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:18:26,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:18:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:18:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:18:26,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:26,307 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:26,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:26,524 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:26,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:18:26,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:26,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052498515] [2021-05-02 20:18:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:26,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:26,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718551485] [2021-05-02 20:18:26,537 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 [2021-05-02 20:18:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:18:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:26,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:18:27,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:27,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052498515] [2021-05-02 20:18:27,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:27,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718551485] [2021-05-02 20:18:27,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718551485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:27,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:27,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:18:27,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383570806] [2021-05-02 20:18:27,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:27,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:27,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:27,173 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:18:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:27,281 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:18:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-02 20:18:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:27,283 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:18:27,283 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:18:27,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:18:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:18:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:18:27,302 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:18:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:27,304 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:18:27,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:18:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:18:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:18:27,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:27,306 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:27,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:27,522 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:18:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:27,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488326917] [2021-05-02 20:18:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:27,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:27,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682315063] [2021-05-02 20:18:27,535 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 20:18:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:18:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:27,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:27,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488326917] [2021-05-02 20:18:27,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682315063] [2021-05-02 20:18:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682315063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:27,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:27,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558870903] [2021-05-02 20:18:27,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:27,712 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:27,741 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:18:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:18:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:18:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:27,745 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:27,745 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:27,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:18:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:18:27,777 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:18:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:27,777 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:18:27,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:18:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:18:27,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:27,781 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:28,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:28,001 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:28,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:18:28,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:28,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396654934] [2021-05-02 20:18:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:28,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227310966] [2021-05-02 20:18:28,031 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 [2021-05-02 20:18:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 20:18:28,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:28,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:28,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396654934] [2021-05-02 20:18:28,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:28,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227310966] [2021-05-02 20:18:28,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227310966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:28,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:28,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:18:28,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745700145] [2021-05-02 20:18:28,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:18:28,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:18:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:18:28,305 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:18:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:28,371 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-05-02 20:18:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:28,371 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), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-02 20:18:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:28,372 INFO L225 Difference]: With dead ends: 52 [2021-05-02 20:18:28,372 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 20:18:28,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 20:18:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-02 20:18:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 20:18:28,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 51 [2021-05-02 20:18:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:28,375 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 20:18:28,375 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), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:18:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 20:18:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:18:28,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:28,376 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 20:18:28,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:18:28,593 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:18:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:28,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242838452] [2021-05-02 20:18:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:28,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:28,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620508952] [2021-05-02 20:18:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:18:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:28,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:29,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242838452] [2021-05-02 20:18:29,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620508952] [2021-05-02 20:18:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620508952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:18:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483054427] [2021-05-02 20:18:29,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:18:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:18:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:29,197 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-05-02 20:18:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:29,487 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-05-02 20:18:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:29,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 54 [2021-05-02 20:18:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:29,488 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:18:29,488 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:18:29,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:18:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:18:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:18:29,488 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 20:18:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:18:29,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 20:18:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:29,488 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:18:29,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-05-02 20:18:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:18:29,489 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:18:29,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:29,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:29 BasicIcfg [2021-05-02 20:18:29,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:18:29,713 INFO L168 Benchmark]: Toolchain (without parser) took 6553.39 ms. Allocated memory was 184.5 MB in the beginning and 224.4 MB in the end (delta: 39.8 MB). Free memory was 150.2 MB in the beginning and 101.7 MB in the end (delta: 48.4 MB). Peak memory consumption was 89.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,713 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 184.5 MB. Free memory is still 167.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:18:29,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.62 ms. Allocated memory is still 184.5 MB. Free memory was 149.9 MB in the beginning and 140.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,713 INFO L168 Benchmark]: Boogie Preprocessor took 110.88 ms. Allocated memory is still 184.5 MB. Free memory was 140.0 MB in the beginning and 167.8 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,713 INFO L168 Benchmark]: RCFGBuilder took 569.90 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 152.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,714 INFO L168 Benchmark]: IcfgTransformer took 18.57 ms. Allocated memory is still 184.5 MB. Free memory was 152.1 MB in the beginning and 150.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,714 INFO L168 Benchmark]: TraceAbstraction took 5522.87 ms. Allocated memory was 184.5 MB in the beginning and 224.4 MB in the end (delta: 39.8 MB). Free memory was 150.4 MB in the beginning and 101.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:18:29,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 184.5 MB. Free memory is still 167.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.62 ms. Allocated memory is still 184.5 MB. Free memory was 149.9 MB in the beginning and 140.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 110.88 ms. Allocated memory is still 184.5 MB. Free memory was 140.0 MB in the beginning and 167.8 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 569.90 ms. Allocated memory is still 184.5 MB. Free memory was 167.8 MB in the beginning and 152.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.57 ms. Allocated memory is still 184.5 MB. Free memory was 152.1 MB in the beginning and 150.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5522.87 ms. Allocated memory was 184.5 MB in the beginning and 224.4 MB in the end (delta: 39.8 MB). Free memory was 150.4 MB in the beginning and 101.7 MB in the end (delta: 48.7 MB). Peak memory consumption was 88.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5475.7ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 17.9ms, AutomataDifference: 1058.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 240 SDtfs, 136 SDslu, 860 SDs, 0 SdLazy, 510 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 646.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 632.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 92.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 121.9ms SsaConstructionTime, 199.3ms SatisfiabilityAnalysisTime, 2120.5ms InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 1011 SizeOfPredicates, 27 NumberOfNonLiveVariables, 964 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 228/248 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! Received shutdown request...