/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:05:09,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:05:09,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:05:09,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:05:09,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:05:09,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:05:09,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:05:09,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:05:09,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:05:09,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:05:09,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:05:09,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:05:09,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:05:09,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:05:09,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:05:09,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:05:09,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:05:09,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:05:09,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:05:09,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:05:09,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:05:09,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:05:09,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:05:09,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:05:09,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:05:09,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:05:09,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:05:09,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:05:09,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:05:09,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:05:09,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:05:09,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:05:09,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:05:09,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:05:09,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:05:09,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:05:09,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:05:09,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:05:09,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:05:09,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:05:09,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:05:09,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:05:09,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:05:09,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:05:09,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:05:09,537 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:05:09,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:05:09,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:05:09,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:05:09,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:05:09,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:05:09,803 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:05:09,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound1.c [2021-05-02 22:05:09,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878805a29/68ebf28b1f664faba4acc0b656bbb1e4/FLAG617a33781 [2021-05-02 22:05:10,247 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:05:10,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound1.c [2021-05-02 22:05:10,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878805a29/68ebf28b1f664faba4acc0b656bbb1e4/FLAG617a33781 [2021-05-02 22:05:10,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878805a29/68ebf28b1f664faba4acc0b656bbb1e4 [2021-05-02 22:05:10,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:05:10,269 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:05:10,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:05:10,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:05:10,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:05:10,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef8f492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10, skipping insertion in model container [2021-05-02 22:05:10,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:05:10,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:05:10,377 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_unwindbound1.c[454,467] [2021-05-02 22:05:10,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:05:10,390 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:05:10,424 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_unwindbound1.c[454,467] [2021-05-02 22:05:10,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:05:10,437 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:05:10,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10 WrapperNode [2021-05-02 22:05:10,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:05:10,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:05:10,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:05:10,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:05:10,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:05:10,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:05:10,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:05:10,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:05:10,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (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 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:05:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:05:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:05:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:05:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:05:10,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:05:10,765 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:05:10,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:10 BoogieIcfgContainer [2021-05-02 22:05:10,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:05:10,767 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:05:10,767 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:05:10,767 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:05:10,769 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:10" (1/1) ... [2021-05-02 22:05:10,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:05:10 BasicIcfg [2021-05-02 22:05:10,780 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:05:10,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:05:10,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:05:10,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:05:10,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:05:10" (1/4) ... [2021-05-02 22:05:10,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab57a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:05:10, skipping insertion in model container [2021-05-02 22:05:10,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:05:10" (2/4) ... [2021-05-02 22:05:10,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab57a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:05:10, skipping insertion in model container [2021-05-02 22:05:10,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:05:10" (3/4) ... [2021-05-02 22:05:10,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab57a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:05:10, skipping insertion in model container [2021-05-02 22:05:10,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:05:10" (4/4) ... [2021-05-02 22:05:10,786 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound1.cJordan [2021-05-02 22:05:10,802 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:05:10,805 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:05:10,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:05:10,851 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:05:10,851 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:05:10,851 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:05:10,851 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:05:10,851 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:05:10,851 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:05:10,851 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:05:10,851 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:05:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:05:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:05:10,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:10,892 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:10,893 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 22:05:10,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:10,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643868522] [2021-05-02 22:05:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:11,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:05:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:11,113 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 22:05:11,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:11,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643868522] [2021-05-02 22:05:11,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643868522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:05:11,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:05:11,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:05:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081162212] [2021-05-02 22:05:11,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:05:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:05:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:05:11,134 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:11,182 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 22:05:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:05:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:05:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:11,190 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:05:11,190 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 22:05:11,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:05:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 22:05:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 22:05:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:05:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 22:05:11,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 22:05:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:11,212 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 22:05:11,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 22:05:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:05:11,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:11,216 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:11,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:05:11,217 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 22:05:11,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:11,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818314870] [2021-05-02 22:05:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:11,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:11,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270161095] [2021-05-02 22:05:11,247 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 22:05:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:05:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:11,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:11,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:11,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:11,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:11,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:11,441 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 22:05:11,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818314870] [2021-05-02 22:05:11,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270161095] [2021-05-02 22:05:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270161095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:05:11,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:05:11,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:05:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666196113] [2021-05-02 22:05:11,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:05:11,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:05:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:05:11,444 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:11,457 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 22:05:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:05:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:05:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:11,459 INFO L225 Difference]: With dead ends: 19 [2021-05-02 22:05:11,459 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:05:11,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:05:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:05:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 22:05:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:05:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 22:05:11,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 22:05:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:11,469 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 22:05:11,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 22:05:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:05:11,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:11,473 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:11,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:05:11,674 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 22:05:11,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:11,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778554148] [2021-05-02 22:05:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:11,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:11,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489336629] [2021-05-02 22:05:11,682 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 22:05:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:11,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:05:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:11,782 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 22:05:11,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:11,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778554148] [2021-05-02 22:05:11,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:11,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489336629] [2021-05-02 22:05:11,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489336629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:05:11,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:05:11,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:05:11,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70337580] [2021-05-02 22:05:11,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:05:11,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:05:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:05:11,785 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:11,815 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:05:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:05:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:05:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:11,818 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:05:11,818 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:05:11,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:05:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:05:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 22:05:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 22:05:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 22:05:11,837 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 22:05:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:11,837 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 22:05:11,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:05:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 22:05:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:05:11,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:11,839 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:12,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:12,053 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 22:05:12,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:12,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192088811] [2021-05-02 22:05:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:12,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:12,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637697984] [2021-05-02 22:05:12,062 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 22:05:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:05:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:05:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:05:12,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:12,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192088811] [2021-05-02 22:05:12,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:12,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637697984] [2021-05-02 22:05:12,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637697984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:05:12,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:05:12,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:05:12,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291850363] [2021-05-02 22:05:12,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:05:12,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:05:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:05:12,233 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:05:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:12,304 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 22:05:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:05:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:05:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:12,306 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:05:12,306 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 22:05:12,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:05:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 22:05:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 22:05:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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 22:05:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 22:05:12,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 22:05:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:12,314 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 22:05:12,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:05:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 22:05:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:05:12,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:05:12,315 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:05:12,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:12,531 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:05:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:05:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 22:05:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:05:12,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021473284] [2021-05-02 22:05:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:05:12,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:05:12,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158582422] [2021-05-02 22:05:12,542 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 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 22:05:12,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:05:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:05:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:05:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:05:12,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:05:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 22:05:12,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:05:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021473284] [2021-05-02 22:05:12,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:05:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158582422] [2021-05-02 22:05:12,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158582422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:05:12,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:05:12,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:05:12,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434756840] [2021-05-02 22:05:12,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:05:12,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:05:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:05:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:05:12,707 INFO L87 Difference]: Start difference. First operand 33 states and 35 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, (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 22:05:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:05:12,735 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-05-02 22:05:12,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:05:12,735 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, (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) Word has length 28 [2021-05-02 22:05:12,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:05:12,735 INFO L225 Difference]: With dead ends: 16 [2021-05-02 22:05:12,735 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:05:12,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:05:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:05:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:05:12,736 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 22:05:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:05:12,736 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-05-02 22:05:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:05:12,736 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:05:12,736 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, (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 22:05:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:05:12,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:05:12,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:05:12,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:05:12 BasicIcfg [2021-05-02 22:05:12,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:05:12,954 INFO L168 Benchmark]: Toolchain (without parser) took 2685.44 ms. Allocated memory was 204.5 MB in the beginning and 268.4 MB in the end (delta: 64.0 MB). Free memory was 169.4 MB in the beginning and 221.8 MB in the end (delta: -52.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,954 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:05:12,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.05 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 187.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,955 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 204.5 MB. Free memory was 187.0 MB in the beginning and 185.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,955 INFO L168 Benchmark]: RCFGBuilder took 291.92 ms. Allocated memory is still 204.5 MB. Free memory was 185.3 MB in the beginning and 171.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,955 INFO L168 Benchmark]: IcfgTransformer took 13.86 ms. Allocated memory is still 204.5 MB. Free memory was 171.3 MB in the beginning and 170.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,955 INFO L168 Benchmark]: TraceAbstraction took 2171.98 ms. Allocated memory was 204.5 MB in the beginning and 268.4 MB in the end (delta: 64.0 MB). Free memory was 169.7 MB in the beginning and 221.8 MB in the end (delta: -52.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-02 22:05:12,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 165.05 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 187.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 204.5 MB. Free memory was 187.0 MB in the beginning and 185.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.92 ms. Allocated memory is still 204.5 MB. Free memory was 185.3 MB in the beginning and 171.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.86 ms. Allocated memory is still 204.5 MB. Free memory was 171.3 MB in the beginning and 170.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2171.98 ms. Allocated memory was 204.5 MB in the beginning and 268.4 MB in the end (delta: 64.0 MB). Free memory was 169.7 MB in the beginning and 221.8 MB in the end (delta: -52.1 MB). Peak memory consumption was 12.9 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2100.3ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 13.6ms, AutomataDifference: 224.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 31 SDslu, 163 SDs, 0 SdLazy, 91 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 99.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 133.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.3ms SsaConstructionTime, 109.2ms SatisfiabilityAnalysisTime, 482.5ms InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 227 SizeOfPredicates, 6 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 16/20 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...