/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:28:01,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:28:01,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:28:01,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:28:01,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:28:01,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:28:01,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:28:01,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:28:01,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:28:01,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:28:01,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:28:01,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:28:01,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:28:01,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:28:01,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:28:01,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:28:01,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:28:01,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:28:01,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:28:01,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:28:01,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:28:01,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:28:01,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:28:01,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:28:01,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:28:01,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:28:01,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:28:01,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:28:01,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:28:01,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:28:01,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:28:01,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:28:01,744 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:28:01,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:28:01,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:28:01,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:28:01,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:28:01,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:28:01,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:28:01,747 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:28:01,748 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:28:02,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:28:02,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:28:02,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:28:02,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:28:02,060 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:28:02,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-05-06 10:28:02,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb79825b2/7814fcf9b75a4263800f85f472a38cf3/FLAGc8fc62962 [2021-05-06 10:28:02,530 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:28:02,530 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-05-06 10:28:02,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb79825b2/7814fcf9b75a4263800f85f472a38cf3/FLAGc8fc62962 [2021-05-06 10:28:02,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb79825b2/7814fcf9b75a4263800f85f472a38cf3 [2021-05-06 10:28:02,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:28:02,556 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:28:02,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:28:02,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:28:02,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:28:02,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370c0d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02, skipping insertion in model container [2021-05-06 10:28:02,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:28:02,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:28:02,748 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2021-05-06 10:28:02,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:28:02,773 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:28:02,787 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2021-05-06 10:28:02,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:28:02,820 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:28:02,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02 WrapperNode [2021-05-06 10:28:02,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:28:02,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:28:02,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:28:02,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:28:02,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... [2021-05-06 10:28:02,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:28:02,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:28:02,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:28:02,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:28:02,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:28:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:28:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:28:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:28:02,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:28:02,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:28:02,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:28:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:28:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:28:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:28:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:28:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:28:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:28:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:28:02,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:28:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:28:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:28:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:28:02,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:28:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:28:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:28:03,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:28:03,203 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:28:03,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:28:03 BoogieIcfgContainer [2021-05-06 10:28:03,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:28:03,205 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:28:03,205 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:28:03,205 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:28:03,208 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:28:03" (1/1) ... [2021-05-06 10:28:03,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:28:03 BasicIcfg [2021-05-06 10:28:03,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:28:03,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:28:03,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:28:03,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:28:03,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:28:02" (1/4) ... [2021-05-06 10:28:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abd2340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:28:03, skipping insertion in model container [2021-05-06 10:28:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:28:02" (2/4) ... [2021-05-06 10:28:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abd2340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:28:03, skipping insertion in model container [2021-05-06 10:28:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:28:03" (3/4) ... [2021-05-06 10:28:03,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1abd2340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:28:03, skipping insertion in model container [2021-05-06 10:28:03,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:28:03" (4/4) ... [2021-05-06 10:28:03,237 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.cJordan [2021-05-06 10:28:03,241 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:28:03,243 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:28:03,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:28:03,269 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:28:03,269 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:28:03,269 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:28:03,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:28:03,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:28:03,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:28:03,270 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:28:03,270 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:28:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-05-06 10:28:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:28:03,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:03,299 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:03,299 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:28:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:03,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738649177] [2021-05-06 10:28:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:28:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:03,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:28:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:03,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:03,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738649177] [2021-05-06 10:28:03,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738649177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:28:03,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:28:03,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:28:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986570578] [2021-05-06 10:28:03,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:28:03,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:28:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:28:03,606 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:28:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:03,685 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:28:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:28:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:28:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:03,693 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:28:03,693 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:28:03,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:28:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:28:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:28:03,721 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) [2021-05-06 10:28:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:28:03,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:28:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:03,727 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:28:03,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:28:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:28:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:28:03,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:03,730 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:03,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:28:03,730 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:28:03,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:03,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211458662] [2021-05-06 10:28:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:03,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022044148] [2021-05-06 10:28:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:28:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:03,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:03,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:03,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:03,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211458662] [2021-05-06 10:28:03,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:03,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022044148] [2021-05-06 10:28:03,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022044148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:28:03,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:28:03,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:28:03,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89203835] [2021-05-06 10:28:03,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:28:03,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:28:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:28:03,933 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:28:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:03,943 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:28:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:28:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:28:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:03,944 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:28:03,944 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:28:03,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:28:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:28:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:28:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-06 10:28:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:28:03,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:28:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:03,949 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:28:03,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:28:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:28:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:28:03,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:03,950 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:04,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:28:04,176 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:28:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:04,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490281124] [2021-05-06 10:28:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:04,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:04,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558074191] [2021-05-06 10:28:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:28:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:04,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:04,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:04,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490281124] [2021-05-06 10:28:04,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:04,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558074191] [2021-05-06 10:28:04,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558074191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:28:04,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:28:04,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:28:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550995215] [2021-05-06 10:28:04,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:28:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:28:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:28:04,311 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:28:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:04,346 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:28:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:28:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:28:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:04,347 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:28:04,347 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:28:04,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:28:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:28:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:28:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:28:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:28:04,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:28:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:04,354 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:28:04,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:28:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:28:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:28:04,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:04,355 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:04,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:04,578 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:28:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:04,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652103340] [2021-05-06 10:28:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:04,589 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:04,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446320673] [2021-05-06 10:28:04,589 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 [2021-05-06 10:28:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:28:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:04,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:04,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:04,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652103340] [2021-05-06 10:28:04,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446320673] [2021-05-06 10:28:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446320673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:28:04,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:28:04,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:28:04,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532364091] [2021-05-06 10:28:04,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:28:04,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:28:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:28:04,781 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:28:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:04,809 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:28:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:28:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:28:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:04,810 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:28:04,810 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:28:04,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:28:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:28:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:28:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:28:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:28:04,815 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:28:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:04,815 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:28:04,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:28:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:28:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:28:04,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:04,816 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] [2021-05-06 10:28:05,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:05,033 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:28:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178719329] [2021-05-06 10:28:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:05,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:05,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975490842] [2021-05-06 10:28:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:28:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:05,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:05,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:05,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178719329] [2021-05-06 10:28:05,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975490842] [2021-05-06 10:28:05,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975490842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:28:05,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:28:05,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:28:05,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770991084] [2021-05-06 10:28:05,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:28:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:28:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:28:05,251 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:28:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:05,349 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:28:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:28:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:28:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:05,351 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:28:05,351 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:28:05,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:28:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:28:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:28:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:28:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:28:05,357 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:28:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:05,357 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:28:05,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:28:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:28:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:28:05,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:05,359 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:05,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:05,563 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:28:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182222154] [2021-05-06 10:28:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:05,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:05,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464327393] [2021-05-06 10:28:05,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:05,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:28:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:28:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:28:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:28:05,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182222154] [2021-05-06 10:28:05,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464327393] [2021-05-06 10:28:05,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464327393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:28:05,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:28:05,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:28:05,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332429995] [2021-05-06 10:28:05,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:28:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:28:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:28:05,784 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:28:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:05,834 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:28:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:28:05,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:28:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:05,835 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:28:05,835 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:28:05,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:28:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:28:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 10:28:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:28:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:28:05,840 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-06 10:28:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:05,841 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:28:05,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:28:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:28:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:28:05,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:05,842 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:06,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:28:06,059 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:06,059 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-06 10:28:06,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:06,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388755803] [2021-05-06 10:28:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:06,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:06,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633333953] [2021-05-06 10:28:06,070 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 [2021-05-06 10:28:06,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:28:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:28:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:28:06,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:06,397 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-06 10:28:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:28:06,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388755803] [2021-05-06 10:28:06,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633333953] [2021-05-06 10:28:06,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633333953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:28:06,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:28:06,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:28:06,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204190962] [2021-05-06 10:28:06,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:28:06,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:06,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:28:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:28:06,512 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:28:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:06,662 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-06 10:28:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:28:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:28:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:06,665 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:28:06,665 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:28:06,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:28:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:28:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 10:28:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:28:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-06 10:28:06,680 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-06 10:28:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:06,680 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-06 10:28:06,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:28:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-06 10:28:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:28:06,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:06,682 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:06,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:06,892 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:28:06,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:06,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656753910] [2021-05-06 10:28:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:06,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:06,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63662362] [2021-05-06 10:28:06,901 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 [2021-05-06 10:28:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:28:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:28:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:28:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:28:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:28:07,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:28:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656753910] [2021-05-06 10:28:07,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:28:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63662362] [2021-05-06 10:28:07,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63662362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:28:07,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:28:07,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:28:07,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650996317] [2021-05-06 10:28:07,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:28:07,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:28:07,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:28:07,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:28:07,089 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:28:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:28:07,148 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:28:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:28:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:28:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:28:07,150 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:28:07,150 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:28:07,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:28:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:28:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:28:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:28:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:28:07,154 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-06 10:28:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:28:07,154 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:28:07,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:28:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:28:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:28:07,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:28:07,156 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:28:07,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:28:07,376 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:28:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:28:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-06 10:28:07,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:28:07,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75107380] [2021-05-06 10:28:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:28:07,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:28:07,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76290147] [2021-05-06 10:28:07,396 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 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