/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/ps2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:06:01,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:06:01,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:06:01,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:06:01,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:06:01,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:06:01,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:06:01,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:06:01,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:06:01,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:06:01,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:06:01,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:06:01,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:06:01,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:06:01,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:06:01,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:06:01,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:06:01,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:06:01,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:06:01,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:06:01,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:06:01,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:06:01,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:06:01,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:06:01,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:06:01,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:06:01,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:06:01,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:06:01,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:06:01,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:06:01,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:06:01,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:06:01,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:06:01,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:06:01,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:06:01,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:06:01,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:06:01,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:06:01,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:06:01,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:06:01,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:06:01,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:06:01,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:06:01,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:06:01,720 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:06:01,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:06:02,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:06:02,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:06:02,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:06:02,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:06:02,032 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:06:02,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-05-02 22:06:02,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced1f84de/04edc3903e3c4d0c9d111fff98ff8a6a/FLAGab0c2fb94 [2021-05-02 22:06:02,443 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:06:02,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-05-02 22:06:02,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced1f84de/04edc3903e3c4d0c9d111fff98ff8a6a/FLAGab0c2fb94 [2021-05-02 22:06:02,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced1f84de/04edc3903e3c4d0c9d111fff98ff8a6a [2021-05-02 22:06:02,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:06:02,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:06:02,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:02,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:06:02,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:06:02,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c68414e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02, skipping insertion in model container [2021-05-02 22:06:02,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:06:02,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:06:02,606 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/ps2-ll_valuebound20.c[454,467] [2021-05-02 22:06:02,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:02,622 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:06:02,672 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/ps2-ll_valuebound20.c[454,467] [2021-05-02 22:06:02,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:02,689 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:06:02,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02 WrapperNode [2021-05-02 22:06:02,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:02,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:06:02,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:06:02,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:06:02,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (1/1) ... [2021-05-02 22:06:02,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:06:02,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:06:02,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:06:02,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:06:02,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (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 22:06:02,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:06:02,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:06:02,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:06:02,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:06:02,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:06:02,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:06:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:06:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:06:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:06:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:06:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:06:03,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:06:03,014 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:06:03,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:03 BoogieIcfgContainer [2021-05-02 22:06:03,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:06:03,016 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:06:03,016 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:06:03,016 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:06:03,018 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:03" (1/1) ... [2021-05-02 22:06:03,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:03 BasicIcfg [2021-05-02 22:06:03,052 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:06:03,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:06:03,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:06:03,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:06:03,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:06:02" (1/4) ... [2021-05-02 22:06:03,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3422c242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:03, skipping insertion in model container [2021-05-02 22:06:03,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:02" (2/4) ... [2021-05-02 22:06:03,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3422c242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:03, skipping insertion in model container [2021-05-02 22:06:03,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:03" (3/4) ... [2021-05-02 22:06:03,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3422c242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:06:03, skipping insertion in model container [2021-05-02 22:06:03,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:03" (4/4) ... [2021-05-02 22:06:03,058 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound20.cJordan [2021-05-02 22:06:03,075 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:06:03,077 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:06:03,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:06:03,116 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:06:03,116 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:06:03,117 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:06:03,117 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:06:03,117 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:06:03,117 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:06:03,117 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:06:03,117 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:06:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:06:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:06:03,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:03,136 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:03,136 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-02 22:06:03,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:03,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250381878] [2021-05-02 22:06:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:03,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:06:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:06:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:03,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:03,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250381878] [2021-05-02 22:06:03,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250381878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:03,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:03,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:06:03,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182545531] [2021-05-02 22:06:03,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:06:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:03,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:06:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:03,387 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:06:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:03,442 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 22:06:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:06:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:06:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:03,448 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:06:03,448 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:06:03,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:06:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 22:06:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 22:06:03,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 22:06:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:03,472 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 22:06:03,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:06:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 22:06:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:06:03,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:03,473 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:03,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:06:03,474 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-02 22:06:03,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:03,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211736561] [2021-05-02 22:06:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:03,489 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:03,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787342690] [2021-05-02 22:06:03,490 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 22:06:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:06:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:03,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:03,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:03,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211736561] [2021-05-02 22:06:03,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787342690] [2021-05-02 22:06:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787342690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:03,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:06:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648185155] [2021-05-02 22:06:03,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:06:03,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:06:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:06:03,684 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:06:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:03,750 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 22:06:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:06:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:06:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:03,751 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:06:03,752 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 22:06:03,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:06:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 22:06:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 22:06:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 22:06:03,761 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 22:06:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:03,763 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 22:06:03,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:06:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 22:06:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:06:03,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:03,765 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 22:06:03,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:06:03,977 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-02 22:06:03,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:03,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258272709] [2021-05-02 22:06:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:03,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:03,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137453087] [2021-05-02 22:06:03,988 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 22:06:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:06:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:04,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:04,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:04,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258272709] [2021-05-02 22:06:04,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:04,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137453087] [2021-05-02 22:06:04,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137453087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:04,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:04,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:06:04,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284900156] [2021-05-02 22:06:04,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:06:04,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:04,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:06:04,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:04,200 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 22:06:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:04,270 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 22:06:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:06:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 24 [2021-05-02 22:06:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:04,271 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:06:04,271 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:06:04,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:06:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:06:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:06:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:06:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 22:06:04,275 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 22:06:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:04,276 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 22:06:04,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 22:06:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 22:06:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:06:04,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:04,277 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:04,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:04,493 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-02 22:06:04,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:04,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475202769] [2021-05-02 22:06:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:04,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:04,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14853522] [2021-05-02 22:06:04,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:04,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:06:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:06:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:06:04,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475202769] [2021-05-02 22:06:04,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14853522] [2021-05-02 22:06:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14853522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:06:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138246677] [2021-05-02 22:06:04,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:06:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:06:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:06:04,708 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:06:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:04,777 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 22:06:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:06:04,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 22:06:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:04,778 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:06:04,779 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:06:04,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:06:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:06:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:06:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:06:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 22:06:04,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-02 22:06:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:04,783 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 22:06:04,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:06:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 22:06:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 22:06:04,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:04,783 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:05,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:05,002 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:05,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-02 22:06:05,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:05,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641617560] [2021-05-02 22:06:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:05,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770343306] [2021-05-02 22:06:05,013 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 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 22:06:05,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:06:05,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:06:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:05,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:05,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:06:05,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641617560] [2021-05-02 22:06:05,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770343306] [2021-05-02 22:06:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770343306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:05,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:05,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:06:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068445951] [2021-05-02 22:06:05,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:06:05,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:06:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:06:05,173 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 22:06:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:05,197 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-02 22:06:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:06:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-02 22:06:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:05,203 INFO L225 Difference]: With dead ends: 41 [2021-05-02 22:06:05,203 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:06:05,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:06:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:06:05,204 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 22:06:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:06:05,204 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-02 22:06:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:05,204 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:06:05,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 22:06:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:06:05,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:06:05,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:05,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:06:05 BasicIcfg [2021-05-02 22:06:05,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:06:05,427 INFO L168 Benchmark]: Toolchain (without parser) took 2962.37 ms. Allocated memory is still 191.9 MB. Free memory was 157.5 MB in the beginning and 73.8 MB in the end (delta: 83.7 MB). Peak memory consumption was 85.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,427 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.42 ms. Allocated memory is still 191.9 MB. Free memory was 157.3 MB in the beginning and 175.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L168 Benchmark]: Boogie Preprocessor took 35.06 ms. Allocated memory is still 191.9 MB. Free memory was 175.1 MB in the beginning and 173.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L168 Benchmark]: RCFGBuilder took 288.62 ms. Allocated memory is still 191.9 MB. Free memory was 173.5 MB in the beginning and 159.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L168 Benchmark]: IcfgTransformer took 36.78 ms. Allocated memory is still 191.9 MB. Free memory was 159.4 MB in the beginning and 158.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L168 Benchmark]: TraceAbstraction took 2373.31 ms. Allocated memory is still 191.9 MB. Free memory was 157.8 MB in the beginning and 73.8 MB in the end (delta: 84.0 MB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:06:05,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.42 ms. Allocated memory is still 191.9 MB. Free memory was 157.3 MB in the beginning and 175.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.06 ms. Allocated memory is still 191.9 MB. Free memory was 175.1 MB in the beginning and 173.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.62 ms. Allocated memory is still 191.9 MB. Free memory was 173.5 MB in the beginning and 159.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 36.78 ms. Allocated memory is still 191.9 MB. Free memory was 159.4 MB in the beginning and 158.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2373.31 ms. Allocated memory is still 191.9 MB. Free memory was 157.8 MB in the beginning and 73.8 MB in the end (delta: 84.0 MB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2309.1ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 12.8ms, AutomataDifference: 318.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 52 SDslu, 375 SDs, 0 SdLazy, 203 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 133.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 250.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.2ms SsaConstructionTime, 114.1ms SatisfiabilityAnalysisTime, 680.6ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 322 SizeOfPredicates, 10 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 38/52 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...