/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/ps5-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:37:56,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:37:56,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:37:56,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:37:56,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:37:56,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:37:56,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:37:56,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:37:56,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:37:56,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:37:56,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:37:56,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:37:56,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:37:56,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:37:56,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:37:56,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:37:56,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:37:56,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:37:56,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:37:56,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:37:56,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:37:56,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:37:56,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:37:56,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:37:56,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:37:56,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:37:56,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:37:56,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:37:56,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:37:56,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:37:56,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:37:56,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:37:56,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:37:56,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:37:56,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:37:56,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:37:56,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:37:56,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:37:56,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:37:56,760 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:37:56,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:37:56,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:37:56,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:37:56,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:37:56,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:37:56,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:37:56,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:37:56,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:37:56,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:37:56,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:37:56,764 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:37:56,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:37:57,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:37:57,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:37:57,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:37:57,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:37:57,185 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:37:57,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound100.c [2021-05-06 10:37:57,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c664d8557/65d3da74981a4f4ab6bef4b3769ea39a/FLAG5c2d8daae [2021-05-06 10:37:57,811 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:37:57,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound100.c [2021-05-06 10:37:57,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c664d8557/65d3da74981a4f4ab6bef4b3769ea39a/FLAG5c2d8daae [2021-05-06 10:37:58,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c664d8557/65d3da74981a4f4ab6bef4b3769ea39a [2021-05-06 10:37:58,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:37:58,284 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:37:58,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:37:58,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:37:58,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:37:58,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aeef043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58, skipping insertion in model container [2021-05-06 10:37:58,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:37:58,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:37:58,430 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/ps5-ll_valuebound100.c[458,471] [2021-05-06 10:37:58,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:37:58,454 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:37:58,483 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/ps5-ll_valuebound100.c[458,471] [2021-05-06 10:37:58,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:37:58,522 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:37:58,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58 WrapperNode [2021-05-06 10:37:58,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:37:58,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:37:58,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:37:58,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:37:58,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:58,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:37:58,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:37:58,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:37:58,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:37:58,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (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 [2021-05-06 10:37:58,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:37:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:37:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:37:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:37:58,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:37:58,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:37:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:37:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:37:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:37:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:37:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:37:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:37:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:37:58,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:37:58,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:37:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:37:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:37:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:37:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:37:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:37:58,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:37:58,961 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:37:58,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:37:58 BoogieIcfgContainer [2021-05-06 10:37:58,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:37:58,964 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:37:58,964 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:37:58,973 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:37:58,976 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:37:58" (1/1) ... [2021-05-06 10:37:59,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:37:59 BasicIcfg [2021-05-06 10:37:59,008 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:37:59,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:37:59,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:37:59,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:37:59,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:37:58" (1/4) ... [2021-05-06 10:37:59,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb03a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:37:59, skipping insertion in model container [2021-05-06 10:37:59,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:37:58" (2/4) ... [2021-05-06 10:37:59,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb03a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:37:59, skipping insertion in model container [2021-05-06 10:37:59,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:37:58" (3/4) ... [2021-05-06 10:37:59,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb03a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:37:59, skipping insertion in model container [2021-05-06 10:37:59,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:37:59" (4/4) ... [2021-05-06 10:37:59,016 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound100.cJordan [2021-05-06 10:37:59,038 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:37:59,043 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:37:59,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:37:59,079 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:37:59,080 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:37:59,080 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:37:59,080 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:37:59,080 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:37:59,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:37:59,080 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:37:59,080 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:37:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:37:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:37:59,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:37:59,140 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:37:59,141 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:37:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:37:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:37:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:37:59,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417964630] [2021-05-06 10:37:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:37:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:37:59,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:37:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:37:59,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:37:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:37:59,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:37:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:37:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:37:59,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:37:59,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417964630] [2021-05-06 10:37:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417964630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:37:59,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:37:59,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:37:59,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639929396] [2021-05-06 10:37:59,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:37:59,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:37:59,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:37:59,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:37:59,520 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:37:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:37:59,642 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:37:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:37:59,645 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:37:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:37:59,656 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:37:59,656 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:37:59,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:37:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:37:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:37:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:37:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:37:59,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:37:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:37:59,700 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:37:59,701 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:37:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:37:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:37:59,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:37:59,704 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:37:59,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:37:59,704 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:37:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:37:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:37:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:37:59,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893924267] [2021-05-06 10:37:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:37:59,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:37:59,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241193902] [2021-05-06 10:37:59,744 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 [2021-05-06 10:37:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:37:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:37:59,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:37:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:38:00,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:00,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893924267] [2021-05-06 10:38:00,007 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:00,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241193902] [2021-05-06 10:38:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241193902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:38:00,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:38:00,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:38:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272450251] [2021-05-06 10:38:00,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:38:00,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:38:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:38:00,014 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:38:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:00,077 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:38:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:38:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:38:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:00,080 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:38:00,080 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:38:00,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:38:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:38:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:38:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:38:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:38:00,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:38:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:00,097 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:38:00,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:38:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:38:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:38:00,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:00,106 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:00,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:38:00,333 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:38:00,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:00,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122882879] [2021-05-06 10:38:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:00,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:00,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222971556] [2021-05-06 10:38:00,353 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 [2021-05-06 10:38:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:38:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:38:00,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122882879] [2021-05-06 10:38:00,636 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:00,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222971556] [2021-05-06 10:38:00,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222971556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:00,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:00,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:38:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878284591] [2021-05-06 10:38:00,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:38:00,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:38:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:38:00,639 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:38:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:00,735 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:38:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:38:00,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:38:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:00,736 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:38:00,737 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:38:00,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:38:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:38:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:38:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:38:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:38:00,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:38:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:38:00,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:38:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:38:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:38:00,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:00,745 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:00,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:00,946 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:38:00,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:00,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079433788] [2021-05-06 10:38:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:00,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:00,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408869787] [2021-05-06 10:38:00,959 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 [2021-05-06 10:38:01,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:38:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:38:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:01,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 10:38:01,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:01,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079433788] [2021-05-06 10:38:01,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:01,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408869787] [2021-05-06 10:38:01,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408869787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:01,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:38:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804502044] [2021-05-06 10:38:01,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:38:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:38:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:01,286 INFO L87 Difference]: Start difference. First operand 39 states and 44 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:38:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:01,716 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:38:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:38:01,717 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:38:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:01,718 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:38:01,718 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:38:01,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:38:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:38:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:38:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:38:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:38:01,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:38:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:38:01,726 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:38:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:38:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:38:01,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:01,727 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:01,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:01,934 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:38:01,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:01,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715420627] [2021-05-06 10:38:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:01,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:01,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584460601] [2021-05-06 10:38:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:38:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:38:02,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:02,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715420627] [2021-05-06 10:38:02,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:02,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584460601] [2021-05-06 10:38:02,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584460601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:02,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:02,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:38:02,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521858962] [2021-05-06 10:38:02,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:38:02,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:38:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:38:02,231 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:38:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:02,299 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:38:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:38:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:38:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:02,304 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:38:02,304 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:38:02,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:38:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:38:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:38:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:38:02,318 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:38:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:02,320 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:38:02,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:38:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:38:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:38:02,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:02,321 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:02,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:02,537 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:38:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427127491] [2021-05-06 10:38:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:02,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:02,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218133482] [2021-05-06 10:38:02,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true