/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/fermat2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:17:35,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:17:35,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:17:35,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:17:35,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:17:35,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:17:35,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:17:35,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:17:35,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:17:35,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:17:35,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:17:35,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:17:35,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:17:35,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:17:35,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:17:35,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:17:35,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:17:35,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:17:35,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:17:35,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:17:35,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:17:35,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:17:35,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:17:35,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:17:35,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:17:35,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:17:35,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:17:35,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:17:35,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:17:35,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:17:35,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:17:35,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:17:35,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:17:35,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:17:35,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:17:35,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:17:35,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:17:35,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:17:35,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:17:35,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:17:35,212 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:17:35,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:17:35,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:17:35,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:17:35,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:17:35,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:17:35,466 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:17:35,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2-ll.c [2021-05-02 19:17:35,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04bcce22/385014c068a1489a99a5b98a0162470e/FLAG587dc3213 [2021-05-02 19:17:35,860 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:17:35,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2-ll.c [2021-05-02 19:17:35,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04bcce22/385014c068a1489a99a5b98a0162470e/FLAG587dc3213 [2021-05-02 19:17:36,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f04bcce22/385014c068a1489a99a5b98a0162470e [2021-05-02 19:17:36,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:17:36,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:17:36,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:17:36,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:17:36,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:17:36,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8b189c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36, skipping insertion in model container [2021-05-02 19:17:36,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:17:36,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:17:36,350 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/fermat2-ll.c[524,537] [2021-05-02 19:17:36,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:17:36,363 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:17:36,370 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/fermat2-ll.c[524,537] [2021-05-02 19:17:36,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:17:36,382 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:17:36,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36 WrapperNode [2021-05-02 19:17:36,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:17:36,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:17:36,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:17:36,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:17:36,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:17:36,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:17:36,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:17:36,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:17:36,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (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 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:17:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:17:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:17:36,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:17:36,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:17:36,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:17:36,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:17:36,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:17:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:17:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:17:36,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:17:36,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:17:36,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:36 BoogieIcfgContainer [2021-05-02 19:17:36,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:17:36,659 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:17:36,659 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:17:36,660 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:17:36,662 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:36" (1/1) ... [2021-05-02 19:17:36,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:17:36 BasicIcfg [2021-05-02 19:17:36,672 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:17:36,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:17:36,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:17:36,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:17:36,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:17:36" (1/4) ... [2021-05-02 19:17:36,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1205d20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:17:36, skipping insertion in model container [2021-05-02 19:17:36,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:17:36" (2/4) ... [2021-05-02 19:17:36,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1205d20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:17:36, skipping insertion in model container [2021-05-02 19:17:36,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:17:36" (3/4) ... [2021-05-02 19:17:36,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1205d20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:17:36, skipping insertion in model container [2021-05-02 19:17:36,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:17:36" (4/4) ... [2021-05-02 19:17:36,677 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll.cJordan [2021-05-02 19:17:36,680 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:17:36,682 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:17:36,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:17:36,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:17:36,705 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:17:36,705 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:17:36,705 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:17:36,705 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:17:36,705 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:17:36,705 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:17:36,705 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:17:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:17:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:17:36,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:36,717 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:36,717 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1058806997, now seen corresponding path program 1 times [2021-05-02 19:17:36,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:36,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319674396] [2021-05-02 19:17:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:36,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:36,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444083235] [2021-05-02 19:17:36,852 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 19:17:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 19:17:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:17:36,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:36,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319674396] [2021-05-02 19:17:36,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:36,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444083235] [2021-05-02 19:17:36,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444083235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:17:36,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:17:36,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 19:17:36,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289166826] [2021-05-02 19:17:36,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 19:17:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 19:17:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 19:17:36,995 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:17:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:37,004 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 19:17:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 19:17:37,005 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 19:17:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:37,009 INFO L225 Difference]: With dead ends: 29 [2021-05-02 19:17:37,009 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 19:17:37,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 19:17:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 19:17:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 19:17:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:17:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 19:17:37,030 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 19:17:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:37,031 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 19:17:37,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:17:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 19:17:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:17:37,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:37,032 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:37,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 19:17:37,245 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1056930164, now seen corresponding path program 1 times [2021-05-02 19:17:37,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:37,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948851590] [2021-05-02 19:17:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:37,256 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:37,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235830636] [2021-05-02 19:17:37,256 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 19:17:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:17:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:37,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:37,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:37,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:37,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:17:37,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948851590] [2021-05-02 19:17:37,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235830636] [2021-05-02 19:17:37,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235830636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:37,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:37,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:17:37,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425266922] [2021-05-02 19:17:37,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:17:37,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:17:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:17:37,462 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 19:17:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:39,579 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 19:17:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:17:39,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 22 [2021-05-02 19:17:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:39,581 INFO L225 Difference]: With dead ends: 33 [2021-05-02 19:17:39,581 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 19:17:39,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:17:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 19:17:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-05-02 19:17:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:17:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 19:17:39,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-05-02 19:17:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:39,586 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 19:17:39,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 19:17:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 19:17:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:17:39,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:39,587 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] [2021-05-02 19:17:39,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:17:39,799 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:39,800 INFO L82 PathProgramCache]: Analyzing trace with hash -127181274, now seen corresponding path program 1 times [2021-05-02 19:17:39,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:39,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850514097] [2021-05-02 19:17:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:39,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:39,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401527005] [2021-05-02 19:17:39,808 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 19:17:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:17:39,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:39,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:39,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:40,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:40,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:40,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:17:40,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:40,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850514097] [2021-05-02 19:17:40,037 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:40,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401527005] [2021-05-02 19:17:40,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401527005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:40,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:40,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:17:40,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515672005] [2021-05-02 19:17:40,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:17:40,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:17:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:17:40,039 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:17:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:49,674 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 19:17:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:17:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:17:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:49,677 INFO L225 Difference]: With dead ends: 34 [2021-05-02 19:17:49,677 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:17:49,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:17:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:17:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 19:17:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:17:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 19:17:49,680 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 28 [2021-05-02 19:17:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:49,680 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 19:17:49,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:17:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 19:17:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 19:17:49,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:49,681 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:17:49,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:17:49,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash -821755077, now seen corresponding path program 1 times [2021-05-02 19:17:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:49,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967088077] [2021-05-02 19:17:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:49,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:49,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515087005] [2021-05-02 19:17:49,897 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 19:17:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 19:17:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:49,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:17:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967088077] [2021-05-02 19:17:50,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:50,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515087005] [2021-05-02 19:17:50,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515087005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:50,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:50,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:17:50,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891988276] [2021-05-02 19:17:50,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:17:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:17:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:17:50,197 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:18:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:17,465 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-02 19:18:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:18:17,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 19:18:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:17,466 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:18:17,466 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:18:17,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:18:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:18:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-05-02 19:18:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:18:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-02 19:18:17,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-05-02 19:18:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:17,470 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-02 19:18:17,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:18:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-02 19:18:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 19:18:17,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:17,471 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:17,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:17,689 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash -793125926, now seen corresponding path program 1 times [2021-05-02 19:18:17,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:17,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482115121] [2021-05-02 19:18:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:17,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:17,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824194259] [2021-05-02 19:18:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 19:18:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:17,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:17,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:32,225 WARN L205 SmtUtils]: Spent 12.25 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 19:18:51,800 WARN L205 SmtUtils]: Spent 11.51 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 19:18:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:51,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:18:51,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:51,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482115121] [2021-05-02 19:18:51,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:51,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824194259] [2021-05-02 19:18:51,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824194259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:51,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:51,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:18:51,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689807012] [2021-05-02 19:18:51,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:18:51,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:18:51,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 19:18:51,868 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:19:31,166 WARN L205 SmtUtils]: Spent 13.92 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:20:09,527 WARN L205 SmtUtils]: Spent 12.74 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 19:20:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:23,700 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 19:20:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:20:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 19:20:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:23,701 INFO L225 Difference]: With dead ends: 44 [2021-05-02 19:20:23,701 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:20:23,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91531.3ms TimeCoverageRelationStatistics Valid=52, Invalid=242, Unknown=12, NotChecked=0, Total=306 [2021-05-02 19:20:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:20:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 19:20:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:20:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-02 19:20:23,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-05-02 19:20:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:23,705 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-02 19:20:23,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:20:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-02 19:20:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:20:23,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:23,706 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:23,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:23,916 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 429220074, now seen corresponding path program 2 times [2021-05-02 19:20:23,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:23,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68304502] [2021-05-02 19:20:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:23,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:23,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980069849] [2021-05-02 19:20:23,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:23,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:20:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:20:23,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:20:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 19:20:24,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:24,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68304502] [2021-05-02 19:20:24,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:24,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980069849] [2021-05-02 19:20:24,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980069849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:24,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:24,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:20:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855286730] [2021-05-02 19:20:24,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:20:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:20:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:20:24,415 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:20:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:30,815 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 19:20:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:20:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 19:20:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:30,816 INFO L225 Difference]: With dead ends: 53 [2021-05-02 19:20:30,816 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:20:30,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:20:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:20:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2021-05-02 19:20:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:20:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 19:20:30,823 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2021-05-02 19:20:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:30,823 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 19:20:30,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:20:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 19:20:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:20:30,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:30,824 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:31,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:31,035 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash 457849225, now seen corresponding path program 1 times [2021-05-02 19:20:31,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:31,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955751065] [2021-05-02 19:20:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:31,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108587329] [2021-05-02 19:20:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:20:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:20:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:20:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:31,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 19:20:31,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:31,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955751065] [2021-05-02 19:20:31,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:31,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108587329] [2021-05-02 19:20:31,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108587329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:31,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:31,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:20:31,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71172703] [2021-05-02 19:20:31,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:20:31,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:20:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:20:31,172 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:20:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:31,192 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-05-02 19:20:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:20:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 19:20:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:31,194 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:20:31,194 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:20:31,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:20:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:20:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 19:20:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:20:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-02 19:20:31,208 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 38 [2021-05-02 19:20:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:31,208 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-02 19:20:31,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:20:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-02 19:20:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:20:31,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:31,212 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:31,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:31,413 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash -76338551, now seen corresponding path program 2 times [2021-05-02 19:20:31,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:31,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113757372] [2021-05-02 19:20:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:31,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:31,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812948646] [2021-05-02 19:20:31,419 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 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 19:20:31,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:20:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:20:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:20:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:31,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:31,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,423 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((main_~R~0 Int)) (let ((.cse1 (* 2 main_~R~0)) (.cse0 (* main_~R~0 main_~R~0))) (and (< (+ .cse0 1) (+ c_main_~A~0 .cse1)) (not (= c_main_~A~0 .cse0)) (<= (+ c_main_~A~0 c_main_~r~0) (+ .cse0 .cse1 1)) (<= .cse0 c_main_~A~0) (= (+ (* 2 c_main_~v~0) (* main_~R~0 main_~R~0 main_~R~0 main_~R~0) (* 2 (* c_main_~A~0 c_main_~r~0)) (* c_main_~r~0 c_main_~r~0) (* c_main_~A~0 c_main_~A~0)) (+ (* 2 (* c_main_~A~0 main_~R~0 main_~R~0)) (* c_main_~v~0 c_main_~v~0) (* 2 c_main_~A~0) (* 2 (* c_main_~r~0 main_~R~0 main_~R~0)) (* 2 .cse0) (* 2 c_main_~r~0)))))) (= c_main_~v~0 1)) is different from false [2021-05-02 19:20:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:34,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,519 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 19:20:45,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:45,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,034 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 19:20:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 8 refuted. 1 times theorem prover too weak. 5 trivial. 4 not checked. [2021-05-02 19:20:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113757372] [2021-05-02 19:20:50,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812948646] [2021-05-02 19:20:50,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812948646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:50,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:50,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:20:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820828346] [2021-05-02 19:20:50,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:20:50,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:20:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=149, Unknown=6, NotChecked=24, Total=210 [2021-05-02 19:20:50,132 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:21:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:21:24,900 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-05-02 19:21:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:21:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 19:21:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:21:24,902 INFO L225 Difference]: With dead ends: 65 [2021-05-02 19:21:24,902 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 19:21:24,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 18354.9ms TimeCoverageRelationStatistics Valid=50, Invalid=254, Unknown=6, NotChecked=32, Total=342 [2021-05-02 19:21:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 19:21:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-05-02 19:21:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:21:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-05-02 19:21:24,906 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 38 [2021-05-02 19:21:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:21:24,906 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-05-02 19:21:24,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:21:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-05-02 19:21:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:21:24,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:21:24,907 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:21:25,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 19:21:25,113 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:21:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:21:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash -47709400, now seen corresponding path program 2 times [2021-05-02 19:21:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:21:25,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842490097] [2021-05-02 19:21:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:21:25,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:21:25,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206757013] [2021-05-02 19:21:25,119 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 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 19:21:25,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:21:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:21:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:21:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:21:25,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:25,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:28,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,851 WARN L205 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 19:21:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 4 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:21:38,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:21:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842490097] [2021-05-02 19:21:38,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:21:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206757013] [2021-05-02 19:21:38,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206757013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:21:38,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:21:38,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:21:38,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521468661] [2021-05-02 19:21:38,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:21:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:21:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:21:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=127, Unknown=4, NotChecked=0, Total=156 [2021-05-02 19:21:38,972 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:22:55,395 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 19:23:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:23:06,533 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-05-02 19:23:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:23:06,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-05-02 19:23:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:23:06,534 INFO L225 Difference]: With dead ends: 69 [2021-05-02 19:23:06,534 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 19:23:06,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 52996.5ms TimeCoverageRelationStatistics Valid=58, Invalid=306, Unknown=16, NotChecked=0, Total=380 [2021-05-02 19:23:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 19:23:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 19:23:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 50 states have internal predecessors, (52), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:23:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-05-02 19:23:06,538 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 38 [2021-05-02 19:23:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:23:06,538 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-05-02 19:23:06,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:23:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-05-02 19:23:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 19:23:06,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:23:06,539 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:23:06,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:23:06,745 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:23:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:23:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 188784537, now seen corresponding path program 3 times [2021-05-02 19:23:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:23:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6142709] [2021-05-02 19:23:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:23:06,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:23:06,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843808667] [2021-05-02 19:23:06,759 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 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 19:23:06,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:23:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:23:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:23:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:23:06,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:23:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:23:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 19:23:06,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:23:06,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6142709] [2021-05-02 19:23:06,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:23:06,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843808667] [2021-05-02 19:23:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843808667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:23:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:23:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:23:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697056642] [2021-05-02 19:23:06,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:23:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:23:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:23:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:23:06,932 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 19:23:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:23:11,464 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-02 19:23:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:23:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2021-05-02 19:23:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:23:11,466 INFO L225 Difference]: With dead ends: 79 [2021-05-02 19:23:11,466 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 19:23:11,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:23:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 19:23:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 19:23:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 58 states have internal predecessors, (59), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 9 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:23:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-05-02 19:23:11,476 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 46 [2021-05-02 19:23:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:23:11,476 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-05-02 19:23:11,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 19:23:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-05-02 19:23:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 19:23:11,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:23:11,478 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:23:11,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:23:11,679 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:23:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:23:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash 217413688, now seen corresponding path program 3 times [2021-05-02 19:23:11,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:23:11,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466692939] [2021-05-02 19:23:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:23:11,689 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:23:11,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657313426] [2021-05-02 19:23:11,689 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 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 19:23:11,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:23:11,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:23:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:23:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:23:11,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:23:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:23:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 19:23:11,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:23:11,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466692939] [2021-05-02 19:23:11,897 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:23:11,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657313426] [2021-05-02 19:23:11,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657313426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:23:11,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:23:11,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:23:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155625231] [2021-05-02 19:23:11,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:23:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:23:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:23:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:23:11,898 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:23:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:23:15,982 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-05-02 19:23:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:23:15,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-05-02 19:23:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:23:15,984 INFO L225 Difference]: With dead ends: 77 [2021-05-02 19:23:15,984 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:23:15,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:23:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:23:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:23:15,984 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 19:23:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:23:15,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2021-05-02 19:23:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:23:15,984 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:23:15,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:23:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:23:15,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:23:16,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 19:23:16,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:23:16 BasicIcfg [2021-05-02 19:23:16,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:23:16,188 INFO L168 Benchmark]: Toolchain (without parser) took 339931.29 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 67.8 MB in the end (delta: 77.1 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,188 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:23:16,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 122.61 ms. Allocated memory is still 179.3 MB. Free memory was 144.7 MB in the beginning and 135.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,189 INFO L168 Benchmark]: Boogie Preprocessor took 50.23 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,192 INFO L168 Benchmark]: RCFGBuilder took 224.28 ms. Allocated memory is still 179.3 MB. Free memory was 162.6 MB in the beginning and 146.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,192 INFO L168 Benchmark]: IcfgTransformer took 13.01 ms. Allocated memory is still 179.3 MB. Free memory was 146.9 MB in the beginning and 145.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,192 INFO L168 Benchmark]: TraceAbstraction took 339514.81 ms. Allocated memory is still 179.3 MB. Free memory was 145.3 MB in the beginning and 67.8 MB in the end (delta: 77.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:23:16,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 161.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 122.61 ms. Allocated memory is still 179.3 MB. Free memory was 144.7 MB in the beginning and 135.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.23 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 224.28 ms. Allocated memory is still 179.3 MB. Free memory was 162.6 MB in the beginning and 146.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.01 ms. Allocated memory is still 179.3 MB. Free memory was 146.9 MB in the beginning and 145.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 339514.81 ms. Allocated memory is still 179.3 MB. Free memory was 145.3 MB in the beginning and 67.8 MB in the end (delta: 77.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 339482.3ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 16.0ms, AutomataDifference: 268267.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 231 SDtfs, 154 SDslu, 1153 SDs, 0 SdLazy, 1103 SolverSat, 42 SolverUnsat, 73 SolverUnknown, 0 SolverNotchecked, 169498.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 403 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 163758.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=10, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.1ms AutomataMinimizationTime, 11 MinimizatonAttempts, 26 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.1ms SsaConstructionTime, 299.9ms SatisfiabilityAnalysisTime, 67960.7ms InterpolantComputationTime, 376 NumberOfCodeBlocks, 344 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 365 ConstructedInterpolants, 40 QuantifiedInterpolants, 3779 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1468 ConjunctsInSsa, 230 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 127/190 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...