/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/geo1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:49:35,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:49:35,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:49:35,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:49:35,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:49:35,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:49:35,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:49:35,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:49:35,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:49:35,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:49:35,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:49:35,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:49:35,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:49:35,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:49:35,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:49:35,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:49:35,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:49:35,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:49:35,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:49:35,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:49:35,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:49:35,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:49:35,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:49:35,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:49:35,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:49:35,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:49:35,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:49:35,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:49:35,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:49:35,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:49:35,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:49:35,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:49:35,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:49:35,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:49:35,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:49:35,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:49:35,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:49:35,875 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:49:35,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:49:36,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:49:36,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:49:36,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:49:36,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:49:36,086 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:49:36,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound5.c [2021-05-02 20:49:36,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3366eff/e3f05e5d76bb41bcb456fa1c3d881eb0/FLAG90b8ed33c [2021-05-02 20:49:36,445 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:49:36,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound5.c [2021-05-02 20:49:36,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3366eff/e3f05e5d76bb41bcb456fa1c3d881eb0/FLAG90b8ed33c [2021-05-02 20:49:36,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b3366eff/e3f05e5d76bb41bcb456fa1c3d881eb0 [2021-05-02 20:49:36,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:49:36,885 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:49:36,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:49:36,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:49:36,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:49:36,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:49:36" (1/1) ... [2021-05-02 20:49:36,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cea1994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:36, skipping insertion in model container [2021-05-02 20:49:36,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:49:36" (1/1) ... [2021-05-02 20:49:36,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:49:36,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:49:36,982 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/geo1-ll_unwindbound5.c[546,559] [2021-05-02 20:49:36,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:49:37,000 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:49:37,016 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/geo1-ll_unwindbound5.c[546,559] [2021-05-02 20:49:37,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:49:37,047 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:49:37,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37 WrapperNode [2021-05-02 20:49:37,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:49:37,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:49:37,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:49:37,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:49:37,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:49:37,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:49:37,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:49:37,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:49:37,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (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 20:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:49:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:49:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:49:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:49:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:49:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:49:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:49:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:49:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:49:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:49:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:49:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:49:37,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:49:37,383 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:49:37,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:37 BoogieIcfgContainer [2021-05-02 20:49:37,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:49:37,384 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:49:37,385 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:49:37,385 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:49:37,387 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:37" (1/1) ... [2021-05-02 20:49:37,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:49:37 BasicIcfg [2021-05-02 20:49:37,398 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:49:37,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:49:37,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:49:37,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:49:37,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:49:36" (1/4) ... [2021-05-02 20:49:37,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533a4f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:49:37, skipping insertion in model container [2021-05-02 20:49:37,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:49:37" (2/4) ... [2021-05-02 20:49:37,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533a4f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:49:37, skipping insertion in model container [2021-05-02 20:49:37,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:49:37" (3/4) ... [2021-05-02 20:49:37,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533a4f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:49:37, skipping insertion in model container [2021-05-02 20:49:37,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:49:37" (4/4) ... [2021-05-02 20:49:37,402 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound5.cJordan [2021-05-02 20:49:37,413 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:49:37,416 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:49:37,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:49:37,439 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:49:37,439 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:49:37,439 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:49:37,439 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:49:37,439 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:49:37,439 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:49:37,440 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:49:37,440 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:49:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 20:49:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:49:37,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:37,461 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 20:49:37,461 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1175629711, now seen corresponding path program 1 times [2021-05-02 20:49:37,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:37,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396512885] [2021-05-02 20:49:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:37,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:49:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:37,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:49:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:49:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:37,720 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 20:49:37,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396512885] [2021-05-02 20:49:37,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396512885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:49:37,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:49:37,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:49:37,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838340855] [2021-05-02 20:49:37,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:49:37,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:37,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:49:37,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:49:37,739 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 20:49:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:37,814 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 20:49:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:49:37,815 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 20:49:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:37,821 INFO L225 Difference]: With dead ends: 31 [2021-05-02 20:49:37,821 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 20:49:37,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:49:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 20:49:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 20:49:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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 20:49:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:49:37,850 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-02 20:49:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:37,850 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:49:37,850 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 20:49:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:49:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:49:37,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:37,852 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 20:49:37,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:49:37,852 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 165914577, now seen corresponding path program 1 times [2021-05-02 20:49:37,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:37,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720352105] [2021-05-02 20:49:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:37,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:37,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746513459] [2021-05-02 20:49:37,865 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 20:49:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:49:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:38,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,082 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 20:49:38,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:38,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720352105] [2021-05-02 20:49:38,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:38,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746513459] [2021-05-02 20:49:38,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746513459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:38,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:38,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:49:38,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986728071] [2021-05-02 20:49:38,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:49:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:49:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:49:38,084 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 20:49:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:38,152 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 20:49:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:49:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 20:49:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:38,153 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:49:38,153 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:49:38,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:49:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:49:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 20:49:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:49:38,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:49:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:38,159 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:49:38,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 20:49:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:49:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:49:38,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:38,159 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, 1] [2021-05-02 20:49:38,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:49:38,360 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash 815968169, now seen corresponding path program 1 times [2021-05-02 20:49:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065866027] [2021-05-02 20:49:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:38,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:38,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415486991] [2021-05-02 20:49:38,377 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 20:49:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:49:38,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:38,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,522 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 20:49:38,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:38,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065866027] [2021-05-02 20:49:38,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:38,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415486991] [2021-05-02 20:49:38,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415486991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:49:38,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:49:38,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:49:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840040685] [2021-05-02 20:49:38,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:49:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:49:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:49:38,524 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:38,533 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 20:49:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:49:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 20:49:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:38,535 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:49:38,535 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:49:38,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:49:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:49:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:49:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 20:49:38,538 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-02 20:49:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:38,539 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 20:49:38,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:49:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 20:49:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:49:38,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:38,540 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 20:49:38,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:38,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -974402257, now seen corresponding path program 1 times [2021-05-02 20:49:38,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:38,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305328297] [2021-05-02 20:49:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:38,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:38,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550608922] [2021-05-02 20:49:38,762 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 20:49:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:49:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:38,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:49:39,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305328297] [2021-05-02 20:49:39,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550608922] [2021-05-02 20:49:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550608922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:39,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:39,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:49:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445973040] [2021-05-02 20:49:39,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:49:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:49:39,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:49:39,033 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:41,201 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 20:49:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:49:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 20:49:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:41,202 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:49:41,202 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:49:41,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:49:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:49:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:49:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:49:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 20:49:41,206 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-05-02 20:49:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:41,206 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 20:49:41,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 20:49:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:49:41,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:41,207 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:41,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:41,408 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash 687559567, now seen corresponding path program 1 times [2021-05-02 20:49:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:41,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823400677] [2021-05-02 20:49:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:41,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:41,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050243327] [2021-05-02 20:49:41,416 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 20:49:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:49:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:49:41,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823400677] [2021-05-02 20:49:41,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050243327] [2021-05-02 20:49:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050243327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:41,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:41,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:49:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802643283] [2021-05-02 20:49:41,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:49:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:49:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:49:41,578 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:41,662 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:49:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:49:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 20:49:41,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:41,665 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:49:41,665 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:49:41,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:49:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:49:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:49:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:49:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 20:49:41,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-02 20:49:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:41,679 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 20:49:41,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:49:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 20:49:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:49:41,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:41,681 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 20:49:41,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:49:41,900 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -192906325, now seen corresponding path program 1 times [2021-05-02 20:49:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:41,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199945583] [2021-05-02 20:49:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:41,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:41,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145272845] [2021-05-02 20:49:41,911 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 20:49:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:49:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:49:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:41,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:41,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:49:42,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199945583] [2021-05-02 20:49:42,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145272845] [2021-05-02 20:49:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145272845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:42,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:42,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:49:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878451708] [2021-05-02 20:49:42,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:49:42,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:42,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:49:42,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:49:42,050 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:49:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:49:42,076 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 20:49:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:49:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:49:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:49:42,078 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:49:42,078 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:49:42,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:49:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:49:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:49:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:49:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:49:42,080 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2021-05-02 20:49:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:49:42,081 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:49:42,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:49:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:49:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:49:42,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:49:42,081 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:49:42,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:49:42,285 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:49:42,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:49:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 33710413, now seen corresponding path program 2 times [2021-05-02 20:49:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:49:42,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601831073] [2021-05-02 20:49:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:49:42,294 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:49:42,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80769234] [2021-05-02 20:49:42,294 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 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 20:49:42,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:49:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:49:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:49:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:49:42,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:42,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:49,296 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 20:49:49,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:49,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:49,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:49:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:49:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:49:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601831073] [2021-05-02 20:49:49,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:49:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80769234] [2021-05-02 20:49:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80769234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:49:49,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:49:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:49:49,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543355784] [2021-05-02 20:49:49,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:49:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:49:49,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:49:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:49:49,352 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:50:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:03,606 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-05-02 20:50:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:50:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-02 20:50:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:03,607 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:50:03,607 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:50:03,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6928.3ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 20:50:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:50:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 20:50:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 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 20:50:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-05-02 20:50:03,610 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2021-05-02 20:50:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:03,611 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-05-02 20:50:03,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:50:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-05-02 20:50:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:50:03,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:03,611 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:03,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:03,819 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:03,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:03,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1012606381, now seen corresponding path program 2 times [2021-05-02 20:50:03,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:03,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881643919] [2021-05-02 20:50:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:03,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:03,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021578736] [2021-05-02 20:50:03,826 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:03,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:50:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:03,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:50:03,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881643919] [2021-05-02 20:50:03,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021578736] [2021-05-02 20:50:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021578736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:03,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:03,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:50:03,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123141180] [2021-05-02 20:50:03,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:50:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:50:03,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:50:03,954 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:50:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:04,005 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 20:50:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2021-05-02 20:50:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:04,006 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:50:04,006 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:50:04,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:50:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 20:50:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.0625) internal successors, (34), 34 states have internal predecessors, (34), 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 20:50:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-05-02 20:50:04,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2021-05-02 20:50:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:04,009 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-05-02 20:50:04,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:50:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-05-02 20:50:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:50:04,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:04,010 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:04,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:04,215 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1752617227, now seen corresponding path program 3 times [2021-05-02 20:50:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:04,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688639484] [2021-05-02 20:50:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:04,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:04,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143626628] [2021-05-02 20:50:04,222 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:04,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:50:04,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:50:04,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:04,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:04,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 20:50:10,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688639484] [2021-05-02 20:50:10,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143626628] [2021-05-02 20:50:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143626628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:50:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002722128] [2021-05-02 20:50:10,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:50:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:50:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:10,482 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 20:50:28,325 WARN L205 SmtUtils]: Spent 17.83 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 20:50:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:30,464 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-05-02 20:50:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 47 [2021-05-02 20:50:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:30,465 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:50:30,465 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:50:30,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17943.3ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:50:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:50:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:50:30,465 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 20:50:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:50:30,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-05-02 20:50:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:30,465 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:50:30,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 20:50:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:50:30,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:50:30,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:50:30,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:30 BasicIcfg [2021-05-02 20:50:30,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:50:30,670 INFO L168 Benchmark]: Toolchain (without parser) took 53784.85 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.0 MB in the beginning and 123.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 61.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.18 ms. Allocated memory is still 183.5 MB. Free memory was 147.8 MB in the beginning and 166.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: Boogie Preprocessor took 37.43 ms. Allocated memory is still 183.5 MB. Free memory was 166.1 MB in the beginning and 164.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: RCFGBuilder took 297.57 ms. Allocated memory is still 183.5 MB. Free memory was 164.8 MB in the beginning and 149.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: IcfgTransformer took 13.23 ms. Allocated memory is still 183.5 MB. Free memory was 149.7 MB in the beginning and 148.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L168 Benchmark]: TraceAbstraction took 53270.76 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.0 MB in the beginning and 123.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 62.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:30,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.18 ms. Allocated memory is still 183.5 MB. Free memory was 147.8 MB in the beginning and 166.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.43 ms. Allocated memory is still 183.5 MB. Free memory was 166.1 MB in the beginning and 164.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.57 ms. Allocated memory is still 183.5 MB. Free memory was 164.8 MB in the beginning and 149.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.23 ms. Allocated memory is still 183.5 MB. Free memory was 149.7 MB in the beginning and 148.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 53270.76 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.0 MB in the beginning and 123.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 62.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 53229.1ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 20.8ms, AutomataDifference: 36762.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 213 SDtfs, 124 SDslu, 757 SDs, 0 SdLazy, 452 SolverSat, 49 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 18379.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 25225.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=7, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.8ms SsaConstructionTime, 184.6ms SatisfiabilityAnalysisTime, 14142.4ms InterpolantComputationTime, 289 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 280 ConstructedInterpolants, 1 QuantifiedInterpolants, 1002 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 84/120 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...