/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/divbin2_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:07:40,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:07:40,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:07:40,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:07:40,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:07:40,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:07:40,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:07:40,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:07:40,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:07:40,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:07:40,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:07:40,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:07:40,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:07:40,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:07:40,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:07:40,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:07:40,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:07:40,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:07:40,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:07:40,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:07:40,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:07:40,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:07:40,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:07:40,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:07:40,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:07:40,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:07:40,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:07:40,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:07:40,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:07:40,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:07:40,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:07:40,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:07:40,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:07:40,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:07:40,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:07:40,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:07:40,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:07:40,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:07:40,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:07:40,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:07:40,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:07:40,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:07:40,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:07:40,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:07:40,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:07:40,646 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:07:40,646 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:07:40,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:07:40,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:07:40,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:07:40,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:07:40,904 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:07:40,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-02 20:07:40,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84584d84b/18abaea3930a4142a91436965449acd8/FLAGb613d5c2f [2021-05-02 20:07:41,316 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:07:41,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-02 20:07:41,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84584d84b/18abaea3930a4142a91436965449acd8/FLAGb613d5c2f [2021-05-02 20:07:41,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84584d84b/18abaea3930a4142a91436965449acd8 [2021-05-02 20:07:41,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:07:41,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:07:41,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:07:41,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:07:41,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:07:41,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4aa005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41, skipping insertion in model container [2021-05-02 20:07:41,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:07:41,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:07:41,824 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/divbin2_valuebound5.i[959,972] [2021-05-02 20:07:41,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:07:41,836 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:07:41,844 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/divbin2_valuebound5.i[959,972] [2021-05-02 20:07:41,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:07:41,856 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:07:41,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41 WrapperNode [2021-05-02 20:07:41,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:07:41,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:07:41,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:07:41,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:07:41,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... [2021-05-02 20:07:41,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:07:41,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:07:41,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:07:41,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:07:41,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:07:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:07:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:07:41,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:07:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:07:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:07:41,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:07:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:07:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:07:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:07:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:07:41,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:07:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:07:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:07:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:07:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:07:42,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:07:42,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:07:42,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:07:42,211 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:07:42,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:07:42 BoogieIcfgContainer [2021-05-02 20:07:42,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:07:42,212 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:07:42,213 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:07:42,213 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:07:42,215 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:07:42" (1/1) ... [2021-05-02 20:07:42,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:07:42 BasicIcfg [2021-05-02 20:07:42,232 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:07:42,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:07:42,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:07:42,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:07:42,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:07:41" (1/4) ... [2021-05-02 20:07:42,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e99664f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:07:42, skipping insertion in model container [2021-05-02 20:07:42,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:07:41" (2/4) ... [2021-05-02 20:07:42,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e99664f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:07:42, skipping insertion in model container [2021-05-02 20:07:42,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:07:42" (3/4) ... [2021-05-02 20:07:42,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e99664f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:07:42, skipping insertion in model container [2021-05-02 20:07:42,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:07:42" (4/4) ... [2021-05-02 20:07:42,237 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.iJordan [2021-05-02 20:07:42,240 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:07:42,242 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:07:42,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:07:42,266 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:07:42,266 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:07:42,266 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:07:42,266 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:07:42,266 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:07:42,266 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:07:42,266 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:07:42,266 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:07:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:07:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:07:42,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:42,280 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:42,280 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2021-05-02 20:07:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:42,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847411166] [2021-05-02 20:07:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:42,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:07:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:07:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:42,405 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 20:07:42,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847411166] [2021-05-02 20:07:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847411166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:07:42,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:07:42,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:07:42,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318926633] [2021-05-02 20:07:42,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:07:42,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:07:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:07:42,419 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:42,458 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 20:07:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:07:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:07:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:42,463 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:07:42,463 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:07:42,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:07:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:07:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:07:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 20:07:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 20:07:42,484 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 20:07:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:42,485 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 20:07:42,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 20:07:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 20:07:42,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:42,486 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:42,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:07:42,486 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2021-05-02 20:07:42,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:42,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261262503] [2021-05-02 20:07:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:42,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:42,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517572105] [2021-05-02 20:07:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:07:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:42,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:42,753 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 20:07:42,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:42,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261262503] [2021-05-02 20:07:42,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:42,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517572105] [2021-05-02 20:07:42,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517572105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:07:42,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:07:42,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:07:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304736623] [2021-05-02 20:07:42,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:07:42,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:42,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:07:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:07:42,756 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:42,888 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 20:07:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:07:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-02 20:07:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:42,890 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:07:42,890 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:07:42,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:07:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:07:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:07:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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 20:07:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 20:07:42,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 20:07:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:42,903 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 20:07:42,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 20:07:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 20:07:42,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:42,909 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:43,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:07:43,127 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2021-05-02 20:07:43,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:43,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016276485] [2021-05-02 20:07:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:43,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:43,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267354104] [2021-05-02 20:07:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:07:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:07:43,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016276485] [2021-05-02 20:07:43,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:43,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267354104] [2021-05-02 20:07:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267354104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:43,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:43,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:07:43,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028765937] [2021-05-02 20:07:43,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:07:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:07:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:07:43,330 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:43,427 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 20:07:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:07:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 20:07:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:43,428 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:07:43,428 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:07:43,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:07:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:07:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:07:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:07:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 20:07:43,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 20:07:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:43,432 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 20:07:43,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:07:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 20:07:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 20:07:43,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:43,433 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:43,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:43,648 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2021-05-02 20:07:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:43,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471863591] [2021-05-02 20:07:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:43,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:43,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010007557] [2021-05-02 20:07:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:07:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:07:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471863591] [2021-05-02 20:07:43,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010007557] [2021-05-02 20:07:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010007557] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:07:43,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:07:43,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:07:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816753470] [2021-05-02 20:07:43,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:07:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:07:43,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:07:43,779 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:43,794 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 20:07:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:07:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 20:07:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:43,795 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:07:43,795 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:07:43,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:07:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:07:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:07:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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 20:07:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 20:07:43,806 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 20:07:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:43,806 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 20:07:43,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 20:07:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:07:43,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:43,808 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:44,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:44,026 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2021-05-02 20:07:44,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:44,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478315726] [2021-05-02 20:07:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:44,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:44,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884804306] [2021-05-02 20:07:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:07:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:07:44,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478315726] [2021-05-02 20:07:44,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884804306] [2021-05-02 20:07:44,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884804306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:44,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:44,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:07:44,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423191689] [2021-05-02 20:07:44,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:07:44,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:07:44,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:07:44,254 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:44,378 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 20:07:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:07:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:07:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:44,379 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:07:44,379 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:07:44,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:07:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:07:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 20:07:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:07:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:07:44,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 20:07:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:44,384 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:07:44,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:07:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 20:07:44,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:44,385 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:44,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:44,601 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -976975752, now seen corresponding path program 2 times [2021-05-02 20:07:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:44,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232468187] [2021-05-02 20:07:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:44,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:44,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222941374] [2021-05-02 20:07:44,610 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:44,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:07:44,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:44,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:07:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:07:44,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232468187] [2021-05-02 20:07:44,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:44,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222941374] [2021-05-02 20:07:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222941374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:44,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:44,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:07:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726977536] [2021-05-02 20:07:44,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:07:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:07:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:07:44,816 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:45,028 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-05-02 20:07:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:07:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 20:07:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:45,030 INFO L225 Difference]: With dead ends: 83 [2021-05-02 20:07:45,030 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:07:45,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:07:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:07:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 20:07:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:07:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 20:07:45,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 20:07:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:45,035 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 20:07:45,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 20:07:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:07:45,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:45,036 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:45,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:07:45,240 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1490579311, now seen corresponding path program 3 times [2021-05-02 20:07:45,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:45,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700322470] [2021-05-02 20:07:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:45,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:45,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372188458] [2021-05-02 20:07:45,250 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:45,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:07:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:07:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:07:45,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:45,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700322470] [2021-05-02 20:07:45,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:45,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372188458] [2021-05-02 20:07:45,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372188458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:45,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:45,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:07:45,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474612367] [2021-05-02 20:07:45,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:07:45,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:07:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:07:45,494 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:45,603 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-05-02 20:07:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:07:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 20:07:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:45,604 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:07:45,604 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:07:45,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:07:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:07:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 20:07:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:07:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 20:07:45,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 20:07:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:45,607 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 20:07:45,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:07:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 20:07:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:07:45,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:45,608 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:45,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:45,812 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 4 times [2021-05-02 20:07:45,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:45,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857659658] [2021-05-02 20:07:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:45,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:45,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097325964] [2021-05-02 20:07:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:45,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:07:45,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:07:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:07:46,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:46,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857659658] [2021-05-02 20:07:46,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:46,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097325964] [2021-05-02 20:07:46,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097325964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:46,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:46,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:07:46,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430443367] [2021-05-02 20:07:46,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:07:46,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:46,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:07:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:07:46,166 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:46,274 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-05-02 20:07:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:07:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 20:07:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:46,275 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:07:46,275 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:07:46,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:07:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:07:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 20:07:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:07:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 20:07:46,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 20:07:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:46,278 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 20:07:46,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 20:07:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:07:46,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:46,278 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:46,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:46,479 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash -79763386, now seen corresponding path program 5 times [2021-05-02 20:07:46,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:46,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571232604] [2021-05-02 20:07:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:46,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:46,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626126718] [2021-05-02 20:07:46,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:46,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 20:07:46,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:07:46,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:07:47,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:47,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571232604] [2021-05-02 20:07:47,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:47,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626126718] [2021-05-02 20:07:47,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626126718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:47,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:47,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:07:47,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042169066] [2021-05-02 20:07:47,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:07:47,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:07:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:07:47,003 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:47,250 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-05-02 20:07:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:07:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 20:07:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:47,252 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:07:47,252 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:07:47,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:07:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:07:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 20:07:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:07:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 20:07:47,256 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 20:07:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:47,257 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 20:07:47,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 20:07:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:07:47,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:47,257 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:47,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:07:47,462 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1741211487, now seen corresponding path program 6 times [2021-05-02 20:07:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684924705] [2021-05-02 20:07:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:47,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:47,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426954125] [2021-05-02 20:07:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:55,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 20:07:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:07:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:55,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:07:55,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684924705] [2021-05-02 20:07:55,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:55,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426954125] [2021-05-02 20:07:55,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426954125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:55,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:55,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:07:55,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511871817] [2021-05-02 20:07:55,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:07:55,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:07:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:07:55,723 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:55,990 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-05-02 20:07:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:07:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:07:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:55,991 INFO L225 Difference]: With dead ends: 73 [2021-05-02 20:07:55,991 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:07:55,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:07:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:07:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 20:07:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:07:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-05-02 20:07:55,994 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2021-05-02 20:07:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:55,994 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-05-02 20:07:55,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-05-02 20:07:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:07:55,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:55,995 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:56,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:56,202 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1769840638, now seen corresponding path program 1 times [2021-05-02 20:07:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:56,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231265943] [2021-05-02 20:07:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:56,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750943386] [2021-05-02 20:07:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:07:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:07:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:07:56,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231265943] [2021-05-02 20:07:56,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750943386] [2021-05-02 20:07:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750943386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:56,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:56,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:07:56,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999932816] [2021-05-02 20:07:56,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:07:56,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:07:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:07:56,511 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:56,637 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-05-02 20:07:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:07:56,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 20:07:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:56,638 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:07:56,638 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:07:56,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:07:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:07:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 20:07:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:07:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-05-02 20:07:56,649 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 41 [2021-05-02 20:07:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:56,650 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-05-02 20:07:56,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:07:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-05-02 20:07:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:07:56,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:07:56,651 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:07:56,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:56,854 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:07:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:07:56,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1748821556, now seen corresponding path program 2 times [2021-05-02 20:07:56,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:07:56,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998481207] [2021-05-02 20:07:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:07:56,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:07:56,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192550217] [2021-05-02 20:07:56,861 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:07:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:07:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:07:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 20:07:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:07:57,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:07:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 20:07:57,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:07:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998481207] [2021-05-02 20:07:57,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:07:57,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192550217] [2021-05-02 20:07:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192550217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:07:57,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:07:57,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:07:57,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577635979] [2021-05-02 20:07:57,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:07:57,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:07:57,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:07:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:07:57,444 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:07:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:07:57,629 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-02 20:07:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:07:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 20:07:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:07:57,630 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:07:57,630 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:07:57,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:07:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:07:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:07:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:07:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:07:57,630 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-05-02 20:07:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:07:57,631 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:07:57,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:07:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:07:57,631 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:07:57,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:07:57,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:07:57 BasicIcfg [2021-05-02 20:07:57,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:07:57,835 INFO L168 Benchmark]: Toolchain (without parser) took 16108.92 ms. Allocated memory was 199.2 MB in the beginning and 245.4 MB in the end (delta: 46.1 MB). Free memory was 165.1 MB in the beginning and 182.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.46 ms. Allocated memory is still 199.2 MB. Free memory was 164.9 MB in the beginning and 155.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: Boogie Preprocessor took 69.80 ms. Allocated memory is still 199.2 MB. Free memory was 155.1 MB in the beginning and 183.4 MB in the end (delta: -28.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: RCFGBuilder took 284.00 ms. Allocated memory is still 199.2 MB. Free memory was 183.4 MB in the beginning and 167.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: IcfgTransformer took 19.32 ms. Allocated memory is still 199.2 MB. Free memory was 167.7 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,835 INFO L168 Benchmark]: TraceAbstraction took 15601.80 ms. Allocated memory was 199.2 MB in the beginning and 245.4 MB in the end (delta: 46.1 MB). Free memory was 166.1 MB in the beginning and 182.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 31.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:07:57,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 181.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 127.46 ms. Allocated memory is still 199.2 MB. Free memory was 164.9 MB in the beginning and 155.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.80 ms. Allocated memory is still 199.2 MB. Free memory was 155.1 MB in the beginning and 183.4 MB in the end (delta: -28.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.00 ms. Allocated memory is still 199.2 MB. Free memory was 183.4 MB in the beginning and 167.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.32 ms. Allocated memory is still 199.2 MB. Free memory was 167.7 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15601.80 ms. Allocated memory was 199.2 MB in the beginning and 245.4 MB in the end (delta: 46.1 MB). Free memory was 166.1 MB in the beginning and 182.1 MB in the end (delta: -16.0 MB). Peak memory consumption was 31.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15567.3ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 19.8ms, AutomataDifference: 1700.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 306 SDtfs, 250 SDslu, 1752 SDs, 0 SdLazy, 1821 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1001.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 392 GetRequests, 257 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1402.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=9, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.4ms AutomataMinimizationTime, 12 MinimizatonAttempts, 58 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.3ms SsaConstructionTime, 8629.0ms SatisfiabilityAnalysisTime, 2336.3ms InterpolantComputationTime, 385 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 373 ConstructedInterpolants, 0 QuantifiedInterpolants, 3072 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1339 ConjunctsInSsa, 320 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 65/182 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...